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Turn Signal Problems and Diagnosis

Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology.

Turn signals can fail in many ways.

Turn signals can fail in many ways.

Turn signal problems and diagnosis can get confusing, especially when a system shares wires and connections with the parking, warning, and braking light systems.

Most common problem sources include bulbs, wires, connectors, fuses, flasher units, and switches. So the average car owner can troubleshoot these faults with the use of a test light and, sometimes, a digital multimeter (DMM).

When dealing with any vehicle electrical circuit fault, it's a good idea to have the repair manual for the particular vehicle make and model you'll be working on. It helps you identify not only wires and components and their related connections, but how to access, troubleshoot and replace components, as necessary.

Furthermore, sometimes it is necessary to access the turn signal switch. You'll have to remove covers and, possibly, the steering wheel. If your vehicle has airbags, it is necessary to disable the passive restraint system (airbags) before working around the switch to prevent accidentally hitting an inertia sensor that may activate the airbags.

Always follow the instructions and warnings in the repair manual for your particular model to prevent an accident. Haynes manuals are popular and practical maintenance and troubleshooting guides. Get the one for your car make and model.

To make troubleshooting easier, this guide is divided into the most common types of turn signal system failures, troubleshooting procedures, and tips to guide you toward the potential fault much faster. Just look for the section heading that describes your particular problem.

Index

I. One of My Turn Signals Doesn't Work

Checking a Light Bulb Socket for Ground and Power

II. One Side of the Turn Signal Lights Doesn't Work

III. My Hazard Lights Don't Work But the Turn Signals Do

IV. Turn Lights Flash Too Fast or Slow

V. Turn Signal Lights Don't Work

VI. Turn Signals Don't Flash

VII. Turn Indicators on Dash Don't Flash

VIII. Turn Indicators Don't Work But Turn Signals Do

IX. Checking the Turn Signal Switch

X. Testing the Turn Signal Flasher

XI. Turn Lights Don't Turn Off

Check all turn lights when troubleshooting the turn signals.

Check all turn lights when troubleshooting the turn signals.

I. One of My Turn Signals Doesn't Work

This is one of the most common faults in turn signal systems. Here are some steps you can take to troubleshoot the problem:

  1. First, check the bulb. You'll need to gain access to the bulb through the engine compartment (front light), trunk (rear light) or by removing the lens itself. Access changes depending on model. If necessary, consult your vehicle repair manual.
  2. Most likely, the turn signal bulb is a two-filament type. Make sure both filaments are in good condition, and that the bulb glass is not darkened. Otherwise, replace the bulb with another one of the same type and wattage.
  3. Examine the bulb socket for corrosion or damage.
  4. If necessary, check the socket ground and power connections. See the next section.
Light bulbs can wear out and stop working.

Light bulbs can wear out and stop working.

Checking a Light Bulb Socket for Ground and Power

Gain access to the light socket you need to test:

  • Unplug the connector.
  • Closely examine the connector, harness, housing and socket.
  • Look for signs of overheating, corrosion, and damage that may lead to a false or broken electrical connection.
  • Pay special attention to ground connections.

You can use a test light here:

  1. After removing the bulb, clip the test light to the socket wall (ground) and touch each socket contact inside with the tip of the test light.
  2. Have an assistant operate the turn signal. The test light should flash—otherwise, there something wrong with the ground or power connections.
  • Connect your test light to a good chassis ground. A bolt or unpainted metal bracket will do.
  • Then touch the socket contacts with your test light tip and have your assistant operate the turn lights. The test light should flash. If it does, check the ground connection at the socket.
  • If the test light didn't flash, connect your test light to battery power and touch the socket wall (ground) with the tip of the test light. Your test light should illuminate. If it does, check and repair the power source connection at the socket.

You can repeat the previous test. But this time install the light bulb to the socket and back probe the connections at the harness connector while operating the turn signal. This way you can also test the connector for a false or damaged connection.

One turn signal can fail in a turn signal system.

One turn signal can fail in a turn signal system.

II. One Side of the Turn Signal Lights Doesn't Work

This is a variation of the previous problems. This time, though, the left or right side of the signals doesn't work. You may see the dash indicator lamps illuminating brightly, but the turn lights won't flash.

You may be dealing with bad bulbs, a bad flasher relay, a faulty turn signal switch, or a bad wire or connector between the flasher unit and the turn signal switch.

  1. First, check the bulbs to see if they are still in good shape: No darkened areas or damaged filaments.
  2. Then, check the sockets for corrosion, wear or damage.
  3. Confirm the ground and power connections are working properly. Refer to the 'Checking a Light Bulb Socket for Ground and Power.'
  4. Check the flasher relay. Refer to section X. Testing the Turn Signal Flasher.
  5. Check outgoing voltage from the turn signal switch to the faulty turn signal side of the circuit. Use a test light or digital multimeter.
  6. If necessary, check continuity from each end of the wire, leading from the flasher relay and the turn signal switch.

You may need the repair manual for your specific vehicle make and model to identify wires and components, and possibly to gain access to them.

Check that your hazard lights work when troubleshooting your turn signals.

Check that your hazard lights work when troubleshooting your turn signals.

III. My Hazard Lights Don't Work But the Turn Signals Do

The hazard or emergency lights may share the same circuit with the turn signal circuit.

  1. When your hazard lights don't illuminate but the turn signals work, usually you are dealing with a faulty hazard-lights flasher.
  2. However, if the flasher unit is working fine, check the fuse.
  3. Also, check for a bad connection at the turn signal switch or an open in the part of the circuit that connects the flasher unit to the turn signal switch. See the section 'Checking the Turn Signal Switch.'
  4. Finally, check for an electrical open or a short circuit in the wiring that connects to the external lights.

IV. Turn Lights Flash Too Fast or Slow

A change in the flashing rate of the turn signal lights isn't common but it can happen.

  • If this occurred after replacing the flasher or one of the light bulbs, you may have installed the wrong type of flasher or bulb for your vehicle model.
  • Or one of your light bulbs may have burned out. A burned-out bulb can cause the indicator light to flash faster.

Other potential problems that may lead to a change in the flashing rate:

  • Poor ground or power connection at the lamps.
  • A loose connection at the turn signal switch.
  • If the lights are flashing faster than normal, make sure the alternator is not overcharging the battery.
  • If the lights are flashing slower than normal, the alternator may have an undercharge condition, or your battery may be undercharged.

V. Turn Signal Lights Don't Work

Another common problem occurs when none of the turn signal lights work.

Note: Normally, you are dealing with a blown fuse, a bad flasher unit, or a faulty turn signal switch. Locate the fuse using your car owner's manual or vehicle repair manual, or check the 'Checking a Light Bulb Socket for Ground and Power' section above, or the 'Testing the Turn Signal Flasher' further down.

Other circuit problems may also lead to this condition:

  1. Check the bulbs condition.
  2. Make a visual inspection of the bulb sockets - look for corrosion and damage.
  3. Verify that the ground connection is working properly. See the section 'Checking a Light Bulb Socket for Ground and Power.'
  4. Also, check for an open (most likely) or a short.
Make sure your turn signal indicators work as well.

Make sure your turn signal indicators work as well.

VI. Turn Signals Don't Flash

If the emergency lights and turn signal lights illuminate but don't flash, check first for a burned-out bulb. This is the most common cause. If not, you may be dealing with a bad flasher unit or a bad turn signal switch. See the sections 'Testing the Turn Signal Flasher' and 'Checking the Turn Signal Switch.'

If necessary, make the following circuit checks:

Check for a blown circuit fuse.

  1. Verify that circuit connections are not loose, corroded or unplugged.
  2. Inspect the wiring harness or terminals for the rear section of the circuit.
  3. Check for a bad connection between the turn signal switch and the flasher or between the flasher and the ignition switch.
  4. Check the power side connection to the turn signal switch for a bad contact or open.
  5. Finally, check for an open or short in the lamp's circuit.
Identify the wires in your turn signal switch using your repair manual.

Identify the wires in your turn signal switch using your repair manual.

VII. Turn Indicators on Dash Don't Flash

You may know there's something wrong with your turn signal lights because the indicator lights on the instrument panel illuminate but don't flash as usual.

  1. First, check that your turn lights work properly. If they come on but don't flash, most likely the flasher unit is bad.
  2. If one of the signal lights doesn't come on, check the bulb; check the bulb socket for corrosion or damage; check for a bad ground at the socket. See the 'Checking a Light Bulb Socket for Ground and Power.'
  3. Check for an open in the circuit, between the light(s) that doesn't work and the turn signal switch.
Use your vehicle turn signals schematic when troubleshooting your turn signal lights.

Use your vehicle turn signals schematic when troubleshooting your turn signal lights.

VIII. Turn Indicators Don't Work But Turn Signals Do

Another problem you may encounter is that your indicator lights don't work at all, but the outside turn lights work fine. Possible causes:

  • blown out indicator bulbs
  • corroded bulb sockets
  • a bad ground
  • a problem with the flasher unit

If necessary, consult your vehicle repair manual to gain access to the bulbs on the instrument panel and ground connection.

Although some models use a separate light for the left and right turn indicators, other models use a single light for both turns.

  • If your instrument panel has only one indicator light for both left and right, check the flasher unit. Some vehicle models combine the brake light, taillight and turn signal into one light bulb.
  • If you have replaced one of the lamps, make sure the bulb is installed properly.
  • If the two separate instrument panel indicator lights don't work but the outside turn signal lamps work, check the indicator light bulbs and flasher unit.
Check turn signal switch connections.

Check turn signal switch connections.

IX. Checking the Turn Signal Switch

Troubleshooting the turn signal switch is pretty much straightforward. Usually, depending on your particular model, getting access to the switch electrical connector is the hardest part.

For this test, it is a good idea to consult the vehicle repair manual for your particular model. You need to identify wires and the best way to access the signal switch electrical connector. Also, if your model has airbags, you may need to disable the system to prevent the bags from accidentally inflating. If necessary, your manual will walk you through the process for your particular model.

  1. Find the wiring diagram for the turn signals in your vehicle model using the repair manual.
  2. Identify the wires carrying power from the flasher unit to the switch and the wires carrying power from the switch to the turn signal lights. Check the color designation for these wires and, if necessary, the terminal number on the electrical connector of the turn signal switch.
  3. Gain access to the turn signal switch electrical connector. You may need to remove an under-dash panel or column cover to see the electrical connector.
  4. Look for the wires that you identified in step 2.
  5. Turn the ignition key to the On position, but do not start the engine.
  6. On the switch connector, find the wire that supplies power to the turn signal switch.
  7. Connect your test light to a good ground under the dashboard - a metal bracket or bolt will offer a good ground.
  8. Operate the switch to turn the left turn signal light.
  9. Back probe the wire that supplies power to the switch; the test light should flash. If the test light doesn't flash, there is a problem with the flasher unit or an open or short between the switch and the battery power source.
  10. Back probe the wire at the connector that supplies power to the left turn signal lights; the test light should flash. If the test light doesn't flash, the switch is bad. Replace the switch.
  11. Back probe the wire that supplies power to the right turn signal lights; the test light should not light. If the test light illuminates, replace the switch.
  12. Repeat the test, but this time operate the switch so the right turn signals light. The only difference in your results this time is that your test light should flash when back probing the terminal that supplies power to the right turn signal lights, but not the left turn signal lights. Otherwise, you need to replace the switch.
The turn signal flasher may be lcoated under the dashboard or inside the engine compartment.

The turn signal flasher may be lcoated under the dashboard or inside the engine compartment.

X. Testing the Turn Signal Flasher

NOTE: This guide deals with analog type flashers. If your system is equipped with a solid state unit, consult your vehicle repair manual for special instructions. Also, make sure to use a digital multimeter with at least 10 Mega-ohm of impedance to protect sensitive circuits in your vehicle as you troubleshoot electrical systems.

A good way to test the flasher unit is to use a known good unit, but that may not be practical. So the next best choice is to test the suspected flasher while installed in the vehicle. Your circuit connections may differ from the outline described here, but you'll find the next general steps helpful. If necessary, consult your repair manual.

  1. First, locate the flasher; you may find the unit under the dashboard near the steering column, or near the battery in a junction box or 'power center.' Consult your vehicle repair manual, if necessary.
  2. Locate the wiring diagram for the turn lamps in your vehicle repair manual.
  3. Identify the colors of the wires that connect to the flasher unit. Identify the wire that supplies power to the flasher, and the wire going from the flasher to the turn signal switch to operate the turn signal lamps.
  4. Connect your test light to ground.
  5. Turn the ignition switch to the On position but do not start the engine.
  6. Operate the turn signal switch in either direction (left or right).
  7. Back probe the power wire that connects to the flasher unit. The test light should illuminate. Otherwise, you have a blown fuse, or there's an open between the flasher unit and its power source (fuse box or battery).
  8. Without operating the turn signal switch, back probe the wire going from the flasher unit to the turn signal switch. The test light shouldn't flash. Otherwise, the flasher is no good.
  9. Now, operate the turn signal switch and back probe the wire going from the flasher unit to the turn signal switch. The test light should flash. Otherwise, the flasher is no good.

The next video shows you a common procedure when replacing a flasher unit on a GMC truck. Depending on your particular vehicle make and model, you may or not need to remove the dashboard trim. On some models, the flasher is readily accessible. Consult your vehicle repair manual.

XI. Turn Lights Don't Turn Off

This is a special turn signal failure. It has to do with the mechanical operation of the signal switch rather than an electrical system failure. For example, you signal traffic your intention to turn left or right, but after cornering, the turn signal continues to flash.

There are two reasons for this type of failure: Either the canceling finger inside the switch is broken, in which case you need to replace the switch; or the canceling cam/clockspring is broken, in which case you need to replace the cam or assembly, depending on your particular model.

In most cases, the repair is within the reach of the average car owner. Still, consult the repair manual for your particular vehicle make and model. Specially if your model has airbags. You'll need to disable the system for safety reasons. Also, your repair manual will tell you what specific tools you need, if any, and the procedure to follow.

Turn signals, and the system they are part of, can fail in many ways. When facing a problem, always check every light so that you know what part of the system or lights are failing. This will make troubleshooting, and fixing the problem, easier and faster. This guide is designed to help you make your repair faster, and get back on the road safer.

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Questions & Answers

Question: My right turn signal doesn't work at all but the flashers work perfectly. What could the problem be?

Answer: The problem may be with the turn signal switch. You can use a test light to check that part of the circuit. If you don't have the manual for your particular model, your local library may have a copy, in case you need it for reference.

Question: My turning indicators don't flash on the dashboard as well as no flashing lights on all the four outside lights but the hazards work. What would it most likely be wrong?

Answer: Check the fuse for the turn signals circuit. Take a look at the flasher unit as well. If they are okay, make sure you have incoming and outgoing voltage on the turn signal switch. There are different setups for the hazards and turn signals. You may need the wiring diagram for your particular model, if you are dealing with a loose or disconnected wire. You can buy a copy at most auto parts stores.

Question: Why does my left turn signal not work while the right turn signal does?

Answer: Check the bulbs on the bad side. The problem can also come from that part of the circuit or the switch itself. Take a look at section II in the post. It may help you diagnose the problem.

Question: My left blinker works just fine but when I use my right, the blinker noise happens but no light pops up on the instrument pannel and both the front and back right blinker dont work. But my hazards do. I've already replaced the flasher unit and the switch on my steering wheel. What could be the issue?

Answer: Need to check the circuit grounds and power for that side of the lights. You can do this with a test light or digital multimeter. Check the wiring diagram in your vehicle repair manual to trace the circuit branch for that leg.

Question: I have a 1994 Chevrolet Blazer. My right turn flashers only dimly flash when running lights are on. New bulbs replaced pigtail, replaced flasher relay. What could cause a dim flashing for the front right turn signal only?

Answer: Check the grounds for the lights. There could be a bad connection. Connect a test light to a good ground, battery negative if possible. Then touch the bulb base with the test light. If it lights good, you got a bad ground.

Question: Why does my turn signal continue to flash after I turn?

Answer: There seems to be a mechanical problem with the turn signal switch. It's not canceling after the steering wheel returns to its normal position. You may need a new switch.

Question: Why do the turn signals work when the car is driven for hours and only in hot days?

Answer: Usually, the problem is in the flasher relay or the multifunction switch. Hope this helps.

Question: I have a 1998 Jackaroo. Sometimes the indicator will work and sometimes it won’t work at all and I can’t find it mentioned anywhere. Can you diagnose the problem with my 1998 Jackaroo's turn signal?

Answer: Look for a loose wire or connector. You may need your repair manual if you need to remove components.

Question: Why does my turn signal and running light work but not the headlights?

Answer: Check the switch, relay, fuse or module.; if necessary, circuit power and ground using a test light or voltmeter.

Question: I have a 2002. Oldsmobile Intrigue. The left turn signal flashes too fast (I replaced the front bulbs). It worked fine for a month. Then I replaced them again and it worked for 4 hours. What do I check next?

Answer: Make sure you are installing the right bulbs for your application. Also, check the flasher relay. Other possible problems is a faulty connection in the circuit or the switch. You can check the circuit with a test light and the wiring diagram for your particular model.

Question: Why does my right turn signal stay on unless it's in the left signal position?

Answer: Check the light bulbs.

Question: My hazard lights are working but the indicators stay on. Do you know of any solution?

Answer: Check the light bulbs, one of them is possibly blown.

Question: Why won't my right signal light flash?

Answer: The most common reason is a bad flasher, but check the fuses, circuit grounds and opens as well, if necessary.

Question: My car's turn signal blinkers don't come on at all. What could it be?

Answer: Take a look at section V. That'll give you an idea.

Question: My turn signals work with headlights off but do not work with the headlights on?

Answer: Most likely there’s a bad ground in the light sockets. Power is going through a ground, and the ground is lost for the turning signals when the lights are on. Check the body grounds and wires in the sockets. Make sure they are clean and well connected.

Question: Why won't my turn signals work? The turn signals won't even come on.

Answer: Check the turn signal (flasher) relay. It might have failed.

Question: Left signal works fine in and out of my car. The right signal hyperflashes inside the car. Right signal works outside in front but not in the back. I replaced the bulbs. Still nothing. Now what?

Answer: You can use a test light or voltmeter to test for power and ground in the faulty rear light. Usually, the problem is a bad ground, but the power wire might be loose, corroded or disconnected. Since the other lights seem to be working fine, concentrate on that part of the circuit. Hope this helps.

Question: The turn indicators work correctly on the outside of the car, but they do not light up on the dashboard. There was a time when the dashboard lights flashed occasionally, so I do not think that it is the light bulbs in the dashboard. I can hear the flasher unit clicking when a turn indicator is selected. Any suggestions, please?

Answer: Check the contacts or the circuit leading to the dashboard, there could be something loose there.

Question: My left turn signal indicator will hyperflash intermittently. No lights are blown and they are not LED. A quick hit to the light housing fixes this for a short time. Checked fuses and wiring. Any idea?

Answer: Check the ground for a poor or loose connection. Other possibility is a failing indicator unit.

Question: My right turn signal won’t turn off. What's wrong?

Answer: Most likely the problem is within the switch, the canceling mechanism might have failed.

Question: Why are my turn signal indicators not clicking?

Answer: Check section VII on the post.

Question: Why does my my left turn signal come on when I push it to go right? Sometimes it doesn’t work at all.

Answer: Usually this indicates a fault in the multi-function switch.

Question: I have a 2006 Chevy Impala and the right front turn signal is not working. The fuses are good as is the bulb. What else could it be?

Answer: If it is only one bulb that isn't working, make sure the bulb is good and then check the socket, power and ground. You can use a test light for this.

Question: I have a 96 GMC Sonoma. When you turn on the right or left turn signal, they both flash. What could cause this? I just put a new turn signal switch in about a month ago.

Answer: You might need the diagram for your model to trace the problem. The problem may be in the switch itself. Also, look for a wire in the circuit that is touching the other wire in the circuit past the relay. If you have installed the harness connector for a trailer, the problem could be in the wire connector.

Question: Why does my turn signal only work like a hazard?

Answer: You may need to look at the circuit diagram for your particular model. But there could be a problem with the multifunction switch or there's a short in the circuit, activating both sides. Using the diagram, you can trace voltage using a test light.

Question: Why do the hazard lights come on when I am using the left turn signal?

Answer: The most common problem is a shorted light bulb causing trouble, an electrical short in the signal switch, or bad flasher relay.

Question: My car indicators work, but there is no clicking sound. It doesn't have flasher relay. The sound is supposed to come from the cluster itself. What could be the cause?

Answer: Some modern vehicle use a solid state relay, and the computer or some other relay may imitate a clicking sound which you hear through the speakers. If the mechanism is not working, it won’t affect your indicators.

Question: I have a 2012 Honda Accord LX. My problem is the left front turn signal stopped working for no apparent reason. All the other turn signals work just fine, including the rear left one. I pulled out the bulb and tested the socket and no power. Is this something that I could fix myself or do I need to have a professional fix it?

Answer: You may be able to fix it yourself. Probably the power wire that connects to the socket or the ground at the socket is loose or disconnected. Use a test light or a voltmeter to check the power wire. If there's power, the problem is the ground. If there's no power, you need to trace the wire back to the switch. Probably is cut or disconnected somewhere. If you need to trace the wire, you may need the wiring diagram from your vehicle repair manual. You can get a manual at most auto parts stores. Hope this helps.

Question: My hazards work and flash; my left indicator works and flashes; my right indicator does not work or flash and there is nothing on the dashboard. I've checked the switch, fuses, bulbs and flasher. How do I fix this awful problem?

Answer: If the flasher is working fine, then the problem could be a bad indicator bulb, socket or circuit problem. You may need the wiring for your specific model to trace the voltage in the circuit, possibly the ground.

Question: The fuses and relay are good but the turn signals on my 2000 Honda Accord LX stopped working all of the sudden. What should I do?

Answer: If none of them are working, start checking at the switch. Check for incoming and outgoing voltage.

Question: My problem is the opposite of number 3 in this article. My hazard lights work fine, so all bulbs are OK and Flasher relay is OK. When using the turn signals from the steering wheel, only the right side of the car works. The left side doesn't, only a very fast clicking sound is heard, like a machine gun. Where is the problem with my car's hazard lights?

Answer: Double check the bulbs and make sure the filaments are Okay. You may want to try swapping the left and right bulbs and see what happens. Possibly the switch is the culprit. But you can check the part of the turn signal circuit for the side that isn't working (lever and switch). Another possibility is a loose wire, or a socket that needs a little twist (bad joint), connection.

Question: My right turn signal "sometimes" does not work. But if I press the hazard it works properly. What could be the problem?

Answer: Sometimes the contacts in the multifunction switch are to blame for this problem. Wiggling the hazard switch makes them work. You might want to have a shop confirm the problem and, if necessary, replace it.

Question: Both my indicators keep flashing and I can't turn them off. What could be the problem?

Answer: There could be a short circuit. A power wire in the turn signal circuit is probably in path with the hazard light circuit. You'll need to test the circuit. A test light or voltmeter and, probably the wiring diagram for your model can help you here. Hope this helps.

Question: I have replaced the signal switch, the relay and a front turn signal bulb. My turn signals will come on for a second and then go off. What else could it be?

Answer: Check the circuit for a loose wire or ground and connectors.

Question: Both of my rear lights aren't working. The indicator blinks rapidly even though I have replaced the bulbs. Any ideas?

Answer: There could be a problem with the power feed line of the circuit. It may be loose. You may need the wiring diagram for your vehicle model to locate and/or trace the wire. You can use a test light for this. If you don't have the manual, try the reference section of your local public library for the manual.

Question: Yesterday, I bought new turn signal bulbs for the left rear and right rear of my vehicle. My left rear already burned out. Why would it burn out the next day?

Answer: Make sure the proper fuse is used to protect the circuit - and check for loose wires around the socket and check the socket itself.

Question: How can I tell if my multiswitch is bad?

Answer: The most common fault in the multifunction switch is wear of the turn signal contacts. They wear out and may begin to fail intermittently or not turn the signal, signal may not cancel; you may experience similar problems with the wipers and headlights. Other than that, you need to gain access to the switch and operate the switch while testing incoming and outgoing voltage with a test light as you operate the different settings. You may need your vehicle repair manual to check the wiring diagram for your particular model.

Question: My turn signal stays on, but doesn’t flash. It’s the driver side. When I turn off the car, it’s still on. It only turns off when I take out a fuse. How do I fix it?

Answer: The problem could be with the flasher (relay). Try removing the relay and plugging it back in and see if the problem goes away. Or replace it. Another possibility is an issue with the switch itself.

Question: Why do my turn signals work when parked but when driving they only flash once or twice?

Answer: Check the circuit relay. It might be failing; or there could be a problem in the switch.

Question: There’s a delay when I turn on my indicator and it starts to work. can you tell me the cause?

Answer: this could be a blinker relay problem, but make sure the connections are okay, as well as at the signal switch.

Question: When I turn my right signal on both, front lights flash and the right flash sonic. It's not the fuse. What could it be?

Answer: A bad connection in the switch or a wire in the circuit is crossing over to the other side of the circuit. You can trace outgoing voltage from the switch using a test light. You may need the wiring diagram in your vehicle repair manual to identify the wires.

Question: I have a 2014 model, 3.2 4x4 Ford Ranger. The front and rear, right turn signals don’t work but the light indicator on the dashboard work. Any advice?

Answer: There could be a problem with the turn signal switch or a faulty connection. Use the repair manual for your model to locate, gain access to the switch and connectors, if necessary. If you don't have the manual, check the reference section of your local public library. They may have a copy for your specific model.

Question: My turn signals and lights work intermittently but my emergency flashers work fine and when we tested them after testing the emergency flashers they worked fine. What could this be?

Answer: There could be a bad ground in the circuit. You may be able to use a test light to check the circuit. Check the wiring diagram for your model. if you don't have the manual, try the reference section of your public library, if necessary.

Question: I have a 2012 diesel Hilux. The right indicator sometimes flashes quick, or it blinks once to 5 times then stops. Doesn’t work at all, blinks fast, then normal, then fast again. It also works fine sometimes. The auto electrician couldn’t fix it. Do you have any ideas?

Answer: There seems to be a loose wire, turn signal relay or relay connector. Usually, the indicator will blink fast when a light bulb burns out. But a bad connection in the circuit or relay can produce the same effect. Just need to check that side of the circuit and find the loose connection.

Question: Why won't my right brake light shine when pressured?

Answer: Check the bulbs and the brake light switch.

Question: I replaced my turn signal bulbs. Now my right signal turns on my hazards and my hazards are right signal. Why?

Answer: If the lights were working correctly before replacing the bulbs, check the sockets for corrosion and the connections. There could be a loose wire. A bad flasher relay does the same thing sometimes.

Question: I just put a new bulb in on the back right, and the next day it was failing. I took it out to look, and it looked almost burned or melted on the bottom where it connects inside the socket. What does this mean?

Answer: There might be some resistance at that part of the circuit. Check the connections at the back of the socket. The wire should be well connected. Also, check the ground. Too much resistance will cause the socket and lamp to overheat.

Question: All my left-hand side indicators and hazard warning work; however, the right side doesn't. Would breakdown assist and would it be covered, as it's unsafe to drive home? And as far as I can make out it’s not the bulbs or fuses in the car. Although I haven't checked fuses or relays in the engine. Also, the side repeater in the driver's door, which is a fixed unit, that bulb is blown, would it take the whole right side out?

Answer: Usually, this is due to a faulty turn signal switch. But you might want to check the bulbs first, and any potential faulty signs you may see in the sockets or wiring to them. Try swapping the door light bulb with the opposite one and see what it does. You can also test the switch using a test light. Go over section two in the post.

Question: I have a 2007 Ford F650 and the turn signals and the 4 ways have completely stopped working. Just recently the driver's side headlight and turn signal got replaced and within 2 days all of the signals and blinkers have stopped working. What could the cause of this be?

Answer: The problem could be with the turn signal switch-- a bad connection or wire. The switch connects to the hazard flasher switch, causing all the lights to fail. You may need your vehicle repair manual to check the switch and a test light to trace voltage. Is usually not too difficult but access may not be too easy.

Question: My left hand side indicators, lights front, back and side work intermittently. What's the cause?

Answer: If the problem only happens sometimes, there's a loose wire in the connector or the switch itself, on that side of the circuit. You may be able to trace the source of the problem using a test light and the wiring diagram. You can find a diagram in the repair manual for your particular make and model.

Comments

Dan Ferrell (author) on July 27, 2020:

Without the wiring diagram, it's hard to tell.

Usually, the flasher relay and signal switch are the most common sources of trouble for this type of problem.

But you may want to double check how you wired your new LED lights. It depends on whether you're using dual beam (one bulb) or single beam (two bulbs).

Probably a chat with these guys could be more productive.

https://www.theretrofitsource.com/buyer-guide-by-v...

Hope this helps.

jason on July 26, 2020:

here’s a weird one...

I have a 1974 volvo 142. When I tested turn signals, I got inconsistent results and suspected I had a loose bulb, connection or fuse issue.

I know nothing of the previous owner other than there were parts in the trunk that suggests they were resto modding and lost interest.

I pulled, cleaned and replaced all fuses. I unplugged all switch “hubs” or “step down connectors” or whatever they are called (located in engine bay) and wire brushed corrosion and reconnected (possible point of mistake).

I put in all new bulbs and checked voltage to each socket (there is voltage, couldn’t tell you if correct amount)

I turned ignition without crank to power the lights...

when I signal left or right, I get Hazards! (?)

The only thing I can think of when considering what went wrong:

1: I connected the multi pin Hella step down dimmer/high beam incorrectly. but the diagrams are difficult to find and I don’t even know if the hazards/turn signals are even associated with this part.

2: when I removed the voltage regulator and put back on, I had two grounds: one from the alternator, and another from the right head light. I attached the grounds to each of two mounting screws for the voltage regulator (maybe that’s okay?)

Second issue:

I replaced my OE headlights with fancy LED.

headlights are activated by pulling a knob. A half pull turns on all signal lights (just on, not flashing) but no headlights. A full pull adds the headlights.

1: I‘m pretty sure i adjust from low beam to high beam by either a half to full pull of the knob OR by pulling back on the signal lever. However, I can’t seem to switch to either. the lights beams are just “On”.

Could both of these issues be related to the step down switch mounted on the finder well? wired incorrectly?

Dan Ferrell (author) on June 17, 2020:

@Nicole - you might want to check the voltage drop for the charging system as well. The test makes sure the connections are good, no corrosion, loose or damaged wires, etc.:

https://axleaddict.com/auto-repair/Charging-System...

Dan Ferrell (author) on June 17, 2020:

Try this: Turn the ignition key to the On position but don't start the engine. Can you see the battery light come on, on the dashboard. This is to check the exciter wire for your alternator. If this wire is damaged, your good alternator won't charge the battery. If your model has this wire coming off the battery light bulb on the dashboard, the battery light won't come on if it is broken. But your particular model may have this wire hooked to the voltage regulator with a fusible link. If the fusible link is blown, same results, your alternator won't charge the battery. So you may be running your car with battery power without letting the alternator charge or properly charge the battery. Check the location of this wire in your particular model and test for voltage. You may need the diagram for your specific model. Hope this helps.

Nicole on June 17, 2020:

To add to my last post about 1999 Ford Windstar, every time we jump it everything works fine no problems or noises or anything, just when we shut it off the battery instantly drains and blinkers go crazy.

Nicole on June 17, 2020:

I have a 1999 Ford Windstar. Only 120,000 miles on it, bought it at 115,000 and never had problems with it until recently. When we shut the car off the blinkers would blink on and sometimes opening a door cause this as well. Than when we try to turn the car on it would not start. This happened for about 3 days and then when AutoZone tested the battery said it was fine than tested the alternator which failed, so immediately we changed the alternator. 5 days go by and it starts doing it again. Test alternator and it's fine, test the battery and it's fine but a guy said might be battery because it's almost 3 years old. We have nothing charging nothing plugged in and today after turning it off my father tried to turn it back on and nothing, but blinkers flashing and lights came on, and my dad said the theft light is randomly off which is a new thing.

I am not a car person but I know electricity electronics and the whole blinkers flashing the moment we turn off the car and battery draining way to quick now makes me think some sort of cable short or some short circuit. Maybe it is the battery but if the car is completely off and the alternator is fine I dont see how the battery could just drain that horribly within seconds especially if it passes the test at AutoZone and a secondary mechanic place.

Any ideas on what's wrong? I read stuff about corrosion sockets, cables, switch assembly, my father brought up ignition switch and I want to know what others may think

Dan Ferrell (author) on June 15, 2020:

If none of the bulbs lights up, check outgoing voltage from the flasher. Hope this helps.

Rob S on June 14, 2020:

Every problem but mine! Flasher unit ticks rapidly but none of the indicator bulbs light up. All bulbs & bulb contacts good. Any suggestions?

Dan Ferrell (author) on May 27, 2020:

There's probably a short to ground. You'll need the diagram for your particular model to trace the short. You can use a testlight for this. Hope this helps.

Hank on May 23, 2020:

My left frt. signal light stays on( not Flashing) and the lft. mirror turn lights also, after the truck is turned off.

Dan Ferrell (author) on May 15, 2020:

Seems like a ground problem in that part of the circuit. You can use a testlight to check the grounds. If necessary, use a diagram for your particular model. You can find one in the repair manual for your vehicle. Get an aftermarket copy at your local auto parts store. Hope this helps.

Star DIY on May 14, 2020:

Hi, when i turn my right blinker on, all lights (brake, reverse, blinker, ect.) flash rapidly on the right rear end assembly. Left assembly good working condition. Please tell me possible causes. Thank u. Also, blinker indicator on dashboard will blink normally when brake pedal IS NOT depressed but when it IS depressed, the blinker indicator with blink rapidly on dash. Thank u.

Dan Ferrell (author) on April 18, 2020:

Check the light bulb in the rear light. You may need to check the grounds in the circuit; you can use a testlight for this. Also, you may need the diagram in the vehicle repair manual for your model. Hope this helps.

Anthony Allen on April 17, 2020:

My left rear blinker won’t light up all the others do and my left indicator light is not working either please help

Dan Ferrell (author) on February 26, 2020:

Something is grounding the turn signal circuit. Often, this is due to corrosion in one or more sockets. Check the sockets using a test light. Also, a shorted turn signal switch can cause this problem. Hope this helps.

Martin on February 25, 2020:

My honda,s left signal light stay consistently on .even when the car is turned off .but the right side signal lights work perfectaly fine .also when the hazards are on .all 4 signal lights front/rear light's stay on .with out blinking .only until i turn the hazard lights off. Then the left signal light stays on for ever .

Dan Ferrell (author) on February 12, 2020:

Check section VII in the post, it may help you diagnose the problem.

Dann on February 12, 2020:

I have 2016 Hyundai Elantra.

Recently I noticed that my left turn signal stays solid green( on dashboard) !

What is the reason.

Dan Ferrell (author) on December 28, 2019:

Make sure the bulbs are good; and check the sockets for corrosion or loose wire (bad power or ground), use a test light. Also, although not as common, a fault in the circuit between the turn signal switch and the connection to that circuit, or the switch itself is bad. Hope this helps.

A govender on December 28, 2019:

I have s Audi a4b6 2oo2 model l am having turn signal problem with the front and back drivers side indicaters not working but my drivers side fender indicated is working

Dan Ferrell (author) on December 21, 2019:

Go over section II in the post; it'll help you diagnose the problem.

TomPatterson on December 20, 2019:

2000 Ford Explorer XLT-THE RIGHT FRONT AND RIGHT BACK BLINKERS DON'T WORK

Dan Ferrell (author) on December 18, 2019:

There might be a loose connection; there problem could be in the switch (if all turn lights fail sometime) or a specific part of the circuit (if only two or one light doesn't work all the time). You may need the diagram for your particular model to trace the problem. Check the switch connections and grounds.

Azariah on December 17, 2019:

In my Honda Accord(2001) my turn signals do not turn always turn on. Approximately 25% of the time it works as intended, the hazard lights work perfectly fine. Any idea what the problem count be, or why it doesn't fail 24/7

Dan Ferrell (author) on December 16, 2019:

There could be a short in that part of the circuit. Check the power connection at the socket. If it is loose it is shorting to ground. Check for corrosion and damage. Hope it helps.

Angela on December 15, 2019:

My turn signal on rear driver side went out so i replaced bulb it worked for 1 day then went out again blinking fast again what could it be i have a 2007 chevy malibu

Dan Ferrell (author) on December 05, 2019:

it seems the turn signal switch is broken. You may want to try checking with a test light if you have the diagram. You'll find it in the vehicle repair manual for your particular model.

Chiwila on December 05, 2019:

Looking for a solution, my left indicator light comes on immediately i switch on the ignition switch on whalest the indicator switch is at neutral position

Dan Ferrell (author) on December 04, 2019:

This is usually caused by a bad flasher relay, but sometimes the turn signal switch fails or a (less likely) a short in the circuit or connector.

JimmyRay on December 04, 2019:

Looking for solution. I turn on left turn signal and rear flashers come on. Right side works fine.

Dan Ferrell (author) on November 21, 2019:

There could be a short in the circuit that is grounding the lights. It's possible the relay or flasher is getting stuck. If necessary, have someone trace the short.

Melinda Smith on November 20, 2019:

Indicator unit replaced after blinkers stayed on when ignition was off, it fixed the problem then drove got out& they were staying on again

Dan Ferrell (author) on September 20, 2019:

It seems like the problem is with the turn signal switch. Once the lever returns to center position, the flasher should be off at this point. The internal mechanism is triggering the wrong contact points.

Mark on September 20, 2019:

Hi Dan, I have a 2006 Chevy Colorado. Both the front and back left side turn signals blink normal on the outside of the truck and the left arrow on the inside dash instrument cluster blinks normal when putting the switch in the left position. When the turn signal switch is in the neutral position both the rear left outside turn signal bulb and the dash instrument cluster arrow stays lit solid (not blinking) and drains the battery. If I put the switch selector in the right position the outside front bulb blinks normal and the rear right does not blink at all and the left arrow on the inside dash instrument cluster stays lit solidly(the right arrow never comes on), When turning on the flasher it is the same meaning both the outside front and rear left bulbs and the right front blink normal and the rear right doesn't work and the inside dash left arrow stays lit solidly. The ground seems to be good in the rear right bulb because the same bulb is used for the tail light and works. I switched the bulb with the left side and it works on that side so it is not the filament. The dark green turn signal power supply wire doesn't seem to have power coming into the connector when I checked with a test light. Do you have any idea what would cause this because I can't follow the wire diagrams too well? Does the 2006 chevy colorado have a flasher? Looks like the switch notifies a bcm. Thank you

Dan Ferrell (author) on September 19, 2019:

Most likely the turn signal switch has mechanical damage. Probably the lock ring is broken. You'll need to replace the unit.

William A Randolph Jr on September 19, 2019:

have a 1994 Oldsmobile Cutlass Supreme S 3.1 and my signal level is sn't moving.I've had the same issue back in 2014 and they had to replace the whole unit.I do have flashers.When I turn the wheel it clicks as if it was turning itself off,but that's it/Will I have to replace this again?

Dan Ferrell (author) on September 02, 2019:

The problem seems to be in the turn signal switch. Check the output voltages there. Probably, you'll need to replace it.

ksteinba on August 31, 2019:

A week ago I bought a restored 65 Pontiac GTO. Today I discovered that the rear turn signals and brake lights do not owrk. The front signals are fine. I replaced the bulbs, even though they looked good, as well as the sockets. With the bulbs removed, turn signal lever in left turn position and the test light grounded to chassis the left socket flashes and the right socket has steady illumination. When the lever is in right turn position the test light flashes in the right socket and glows in the left. With key on and turn signal lever in the middle the right rear light is on. There is also a scenario, though I forget exactly when, that the right signal flashes with the lever in the left turn position and vice versa. Since there are no brake lights at all my friend checked for power at the brake light switch. When he accidentally bumped the ignition key the test like flashed. I'm baffled.

Dan Ferrell (author) on August 26, 2019:

Probably the spring inside the multi-function switch is broken and not cancelling the signal after completing the turn. You may need to replace the switch.

RENAE on August 24, 2019:

What would cause your blinkers not to shut off

Dan Ferrell (author) on August 10, 2019:

It seems the switch in the indicator stalk is faulty, probably the internal spring is turning the wrong contact for the indicator. Also, this could be a loose wire problem making the wrong contact in the switch. This can be checked with a test light. You'll need access to the switch, and perhaps the diagram for your particular vehicle make and model so you can trace the wires. You can find the manual at most auto parts stores. Hope this helps.

Leisa on August 10, 2019:

Light for indicator on dash is flashing right when I have moved the stalk into the left position (die. to turn left) External light is flashing left as it should be. Why is right arrow on my dashboard flashing when it should be the left one flashing.

Dan Ferrell (author) on August 03, 2019:

Check the light bulbs, if they are okay, probably the flasher relay or switch are the problem.

Carmena on August 03, 2019:

My turn light aren't flashing on dashboard and aren't on all 4 sides of car on a 1988 dodge caravan. What would it most likely be?

Dan Ferrell (author) on July 31, 2019:

Check for a problem in a light control module, or headlight (switch) connector or circuit. A relay may be stuck or a problem with a wire in the circuit. You may need a test light and your wiring diagram to trace the fault. Hope this helps.

Gio Z on July 30, 2019:

I have a 2006 Ford Mustang and when I start the car the hi beams and left turn signal are on and won’t turn off. What is causing this?

Dan Ferrell (author) on July 22, 2019:

You need to replace the turn signal switch assembly. You may do it yourself, if you have the service manual for your particular model. Get one online or at your local auto parts store.

larry on July 22, 2019:

i have to hold left turn signal the right one will not turn off as i center steering wheel

Dan Ferrell (author) on June 26, 2019:

Something is worn with one of the bulbs or possible ground or power is not getting properly to the socket. Check how much voltage you are getting or dropping. Probably this other post may help:

https://axleaddict.com/auto-repair/Automotive-Volt...

Wgeep on June 25, 2019:

I have an 08 JK, my hazards work fine. However, only my front passenger side turn signal does not work (everything else works as it should). It does have rapid flash when on though. I have used a multimeter and I am getting current on all these wires. How do I fix this?

Dan Ferrell (author) on June 17, 2019:

Check the fuses. There could be a short that affected the circuits.

Kim on June 17, 2019:

Hi, My 2000 Ford Taurus signal lights (front, rear, and indicators), hazard lights, rear brake lights are not working. Please, may you point me in the right direction? Thanks.

Dan Ferrell (author) on June 03, 2019:

These are two separate circuits. Check to see if you have voltage to and from the multifunction switch. You may need a wiring diagram to trace the voltage if necessary. Specially check the connector.

Michael StGermain on June 03, 2019:

My blinkers only work if my hazard button is pushed down on a 2004 Ford Expedition why is that

Dan Ferrell (author) on May 31, 2019:

Check the relay first. Then check the switch, if necessary.

Glenn macdonald on May 30, 2019:

i have a 2001 ford expedition blikers quit fuse is not blown what do i do.could using the tilt stering cause this problem also

Dan Ferrell (author) on May 20, 2019:

There could be a bad ground in the circuit crossing the path of the other light. Other possibility is corrosion in the connector(s) or a bad connection in the circuit.

Eric on May 20, 2019:

When turn on either turn signal the other one has a dim flash in it also. This is on my small tote trailer I pull behind my motorcycle

Dan Ferrell (author) on May 15, 2019:

This could be a little hard to diagnose, but you may be dealing with a loose/corroded wire in the circuit. This puts too much resistance in a circuit, which heats up and stops working. The problem can be in the turn signal circuit or switch. Have the circuit checked. This other post may help:

https://axleaddict.com/auto-repair/Bad-Engine-Grou...

Banda on May 15, 2019:

2014 Nissan versa

My rear turn signals work for like the first 10 min and after that they don't work anymore and when I use my turn signal it is causing my car to jurk

Dan Ferrell (author) on May 14, 2019:

It seems an open or short is activating the turn signal circuit. Look up the wiring diagram for your particular model. You'll need a test light or voltmeter to trace the fault. These other posts may help:

https://axleaddict.com/auto-repair/How-to-find-a-C...

https://axleaddict.com/auto-repair/How-to-Find-a-C...

Tory on May 14, 2019:

My hazards won't turn off. It kills my battery if i don't unplug it. The turn signal fuses are apart of the hazards so i couldnt just pull that fuse out. I changed them to see if that was the problem but wasn't. What could that be?

Dan Ferrell (author) on April 24, 2019:

There could be a bad ground. This other post may help:

https://axleaddict.com/auto-repair/Bad-Engine-Grou...

Reggie on April 23, 2019:

My turn signal, horn, windows, and radio dont work what could be the problem.

Dan Ferrell (author) on April 16, 2019:

There could be a bad ground in the circuit keeping the indicators working when they’re not supposed to. If you recently replaced one of the bulbs, make sure you are using the right one for your application. Swap bulbs to see if there’s any difference. You may need a test light and the wiring diagram for your model to check the circuit.

Glennis Barnes on April 15, 2019:

My turn signals seem to work but the clicking indicating blinkers engagement doesn't stop when turn signal is disengaged.

Dan Ferrell (author) on April 09, 2019:

Make sure you are using the correct bulbs for your application. Also, check those bulbs that you replaced and the ones that were there for the turn signals. Probably one of the filaments is broken and stuck across the other filament. Also, there could be a bad ground for the turn signals. Hope this helps.

Jim on April 09, 2019:

I have a 2005 Chevy 2500hd. My tail lights and headlights were just replaced. All new bulbs. My turn signals work fine without day time lights on or auto lights turn on. When lights come on my left turn signal stays on and left signal blinks fast.

Dan Ferrell (author) on March 28, 2019:

It's possibly a bad relay, but there could be a loose connetion, or ground. If only one of the right lights isn't working check the socket and connections; if both lights on the right side, there could be a problem in the circuit. You can use a test light to check for a loose or disconnected wire.

RonaldThompson on March 27, 2019:

I have a 2007 Isuzu Ascender. Left turn signal works great but when i use the right signal, it works occasionally and other times it stops after a few seconds when i turn it on. Sometimes i have to reapply the right turn signal to finish my turn. Im thinking switch or TS relay

Dan Ferrell (author) on March 16, 2019:

Usually the problem is with the flasher relay.

stillwater on March 16, 2019:

2006 lincoln zephyr front signal light won't blink and stays on even when key is shut off ?

Dan Ferrell (author) on March 14, 2019:

Check the ground and power for the rear lights. You can do this with a test light. There could be a problem with the socket.

Dan Ferrell (author) on March 14, 2019:

Sometimes a bad chassis ground can keep the lights from working properly. Check the wire that connects from the battery to chassis. You may want to do a voltage drop to make sure grounds are okay:

https://axleaddict.com/auto-repair/Automotive-Volt...

Neil on March 14, 2019:

My 2006 Impala LTZ right rear turn signal / Brake light is intermittent.

I've pulled the assembly out to check the bulbs. They all worked. Put the light assembly back on and lights won't work. Didn't touch the car for two days. Went out to start car and the lights worked! What's going on?

Jim on March 13, 2019:

Hello! Here I go! My 2009 Silverado turn signal, brake and reverse lights don't work on the rear right side only. The right arrow on the dash blinks fast. The front turn signal blinks at the same speed (fast) as the arrow on the dash. I've changed all the bulbs and checked every fuse except the big ones. What's up?

Dan Ferrell (author) on March 13, 2019:

Use a test light to check the power wire and ground at the light socket. There could be a bad power or ground connection.

Dan Ferrell (author) on March 13, 2019:

Usually the problem is with the circuit connections either at the light itself or the switch. If only one light or one side is flashing quickly, check that part of the circuit. You may need the diagram for your model, if you need to trace the wries in the circuit. If necessary, do a voltage drop in that part of the circuit:

https://axleaddict.com/auto-repair/Automotive-Volt...

Hope this helps.

Anthony A Gortmaker on March 13, 2019:

I have a 94 Gmc Sierra, My left turn signal is flashing quickly when the running lights or headlights are on, but flash normally when the head lights or running lights are off. I replaced the whole tail light recently due to the previous owner using zip ties and spot welding to hold it together but the problem persist.

This only started recently after I did a tune up and replaced the distributor cap and rotor, as well as my spark plugs and cables.

Any help would be appreciated.

terrymcc on March 13, 2019:

left rear indicator light not working despite bulb changed.

when left turn selected, green left arrow indicator flashes very fast which, according to manual, could be a defective bulb.

hazard warning lights work on 3 sides but not left rear.

all other lights working fine.

have tested replacement bulb by switching it with right hand rear indicator bulb, and it works but right rear bulb will not work on left.

Dan Ferrell (author) on February 12, 2019:

There could be a problem in the wiring; check for a short. If the body control module connects to it, unplug the wire and reconnect. See if that helps.

Dan Ferrell (author) on November 20, 2018:

Check section VIII on the post. That's give you an idea what to troubleshoot in the system.

Chris on November 19, 2018:

I have a Mercedes benz.when I turn on my lights the indicators doesn't work

Dan Ferrell (author) on October 05, 2018:

Check the bulb filaments and make sure they are not shorted together, then check a loose wire perhaps making a wrong connection in that side of the circuit. Hope this helps.

Joe on October 05, 2018:

Hi Dan.

Thanks for your article. It was real informative.

My problem is that with parking lights on my RH turn signals are stuck lit, but a little bit dimmer than normal with no dash indication. When I use the indicator they seem to blink a little bit brighter. The dash light works normally to both sides using indicator and hazards

Dan Ferrell (author) on September 26, 2018:

Check section V of this post. That's give you some help.

Dan Ferrell (author) on September 26, 2018:

Check the fuses first.

Lorenzo Allen on September 26, 2018:

My head lights and brake lights are on hazard lights work. But turning signals want work

Rach on September 26, 2018:

Hi, my hazard lights work but turn signal and blinkers are not going either.

Dan Ferrell (author) on September 10, 2018:

Check the flasher unit.

Jim Berry on September 09, 2018:

Turn signals show up as working but can’t hear the flashing.

Dan Ferrell (author) on September 06, 2018:

Hi John

You need to check the switch and the wiring for that part of the circuit - you need the diagram for the vehicle to follow the voltage.

Hope this helps

Dan Ferrell (author) on September 06, 2018:

Hi Jim,

Check the wiring behind the socket, something is causing the voltage to drop perhaps, which is causing the rapid blinking of the front light.

Hope this helps

Jim on September 06, 2018:

99 Jeep Wrangler. All indications of a burned out left rear turn signal bulb (front bulb still works, now at faster rate, dash indicator is also at faster rate, right turn signal system works completely fine). The rear bulb looks ok, but I swapped it out with one I know that works. Didn't solve the issue. Checked the voltage on the contacts that connect to the bulb and it is good (alternates between 4V and 0V when the turn signal is engaged). I'm stumped. Any help would be greatly appreciated!

John on September 05, 2018:

75 gmc pickup. New flasher, new bulbs. Brake lights, hazard lights and right turn signals work. Left side - only the front turn signal is working. Same bulb for the hazard and they work. I have switched bulbs thinking the filament was broke and it works in the right side rear. Why would ONLY the left rear turn signal not flash.

Dan Ferrell (author) on September 03, 2018:

Probably there's a hazard-lights flasher that needs to be checked or the circuit - and also check the flasher unit for the turn signals, if separate. Another possibility is the turn signal switch or connections.

Brad on September 02, 2018:

1972 Chevy Nova

Left turn signal works on outside of car but won’t light up on dashboard. I can hear clicking sound and it blinks on outside. Also my hazard lights won’t work at all. Could this problem be related?

Dan Ferrell (author) on August 31, 2018:

Hi Jackson,

There could be a problem with the switch itself. You may need the diagram for your model. It'll tell you how to trouble shoot it.

Good luck

Jackson H on August 31, 2018:

Hello,

My car does this strange thing where when I hit the lever to turn left it alternates between the left and right lights twice and then works just fine. At the moment that is not really an issue as it corrects itself in a few seconds, but I wonder what they cause is and if it will get worse.

Thanks!

Dan Ferrell (author) on August 30, 2018:

Hi Terrie,

There seems to be a problem with the switch itself, or the wiring. You'll need the diagrams for your vehicle to trace the voltage.

Good luck

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