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How to Diagnose an Alternator or Electrical Problem

I've worked in a variety of hands-on professions and love to write about topics that can save readers from needless expenses.


Diagnosing alternator problems can be a bit tricky because the electrical system in a car comes from two places, the battery and the alternator. I'll give you a little background so you can understand what both systems do.

  • The battery has one primary function, which is to start the car. It provides the high amount of voltage needed to turn the engine over. After the engine is running, the alternator takes over.
  • The alternator is basically a generator that provides an even amount of low-level electricity, which it generates with a circular bundle of copper wires and a rotating magnet.

After the engine starts (thanks to the high voltage provided by the battery), the alternator provides the electricity required to power the car's many electrical functions, including the lights and radio, the spark, charging the battery, and others.

What Happens When Your Car Has an Electrical Problem?

When your car has an electrical problem you will notice any of the following:

  • The car's power slowly dies while you're driving.
  • The car's lights begin to dim.
  • You have trouble starting the car.
  • The car won't start at all.

What to Check to Diagnose Your Car's Electrical Problem

AlternatorBatterySpark Plug or Ignition CoilSolenoid or Starter

If the problem is a bad alternator, your car will slowly lose power. You'll be driving down the road, your lights will dim, and you'll lose power and die.

If the problem is with your battery, then you'll generally only have trouble starting your car since that's the battery's main function. Your lights may also be very dim.

When an ignition coil goes bad, the result is similar to a failed alternator: The car loses power and won't start.

If your car's solenoid or starter are bad, the lights will shine brightly but the engine will not start.

Once the alternator stops working, so do all of the electrical systems required to keep a car going.

Other problems can also cause a car to not start. It could be a bad starter, corroded cables, or a broken connection somewhere between the battery and starter.

When a coil goes bad there may be smoke or odor. Open the hood immediately and check.

A failed solenoid can make a clicking sound when you try to start the engine.

What Causes a Faulty Coil or Spark Plug?

Spark plug or coil problems can also make your car lose power and die. The ignition coil turns the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs, which ignite the fuel. Coils can fail due to heat or vibration, or when there is a bad connection to the spark plugs.

As described above, when the coil goes bad, parts of it often melt and there's sometimes smoke or an odor. This will only really help you if you open up the hood immediately after it happens and check. If you check hours or days after the fact, then you won't be able to smell anything anymore.

Dual ignition coils (the blue cylinders at the top of the picture) on a Saab 92.

Dual ignition coils (the blue cylinders at the top of the picture) on a Saab 92.

Test Your Systems Before Going to the Auto Parts Store

Before you go out and order a new battery or alternator, test some of these different systems. If your alternator, coil, battery, or starter is bad, the car probably won't start, and it definitely won't be drivable.

Try to get as much information as possible so that you can get the right parts quickly when you go to the auto store. Depending on which system is bad, you should be able to fix it yourself.

Alternator Prices and Installation

Make sure that your current alternator is beyond repair first before getting a new one. Alternator prices can vary greatly by make and model, but generally speaking, new alternators should run around $250 without labor for installation.

If you're going to order and install the part for yourself, then it shouldn't be too expensive—just a few hundred bucks. If you need to have it installed by the mechanic, then the price might be a bit higher.

Depending on where your alternator is located within the compartment, the installation might only take an hour. But if the alternator is difficult to access, it might require removal of other parts and it could take many hours.

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.

© 2010 Benji Mester


Kealeboga Selome on August 31, 2020:

am driving a nissan hardbody ka 24 but the altinator pully becomes hot when the engine runs

What could be the course

Angel shaneyfelt on August 29, 2020:

Ivhave a ford tarus ses we changed battery ultnator and checkes fuses and tracked wire my husband said check charging system comes on and every time you hit brakes poewr comes on you take off it drops all dials battery light comes on and your power windows die

Scooter on July 30, 2020:

If I was jump starting another vehicle and I aren't the negative battery cable to the side of the truck and now none of my lights on the left side of my truck work what's wrong with it

Hali Jenkins on July 17, 2020:

I have a 2004 spyder eclipse. Will not crank or start. I was messing with the wires behind the radio then all of a sudden everything started blinking on my dash and the ding sound from no seatbelt sounds fast and short

Monica Worden on June 30, 2020:

Need the answer to Richard Cline's 2005 chev sub. Sounds exactly what my buicks doing. Dose anyone know how i can get it?

Herman on June 16, 2020:

My old ford tractor suddenly went dead. When ignition is off I have power to the solenoid and the hot pole of the Ignition switch. Throw the switch and everything is dead. Disconnecting the coil OR the distributor restores power to the solenoid and ignition switch. What do I do next!

James Hubbard on May 26, 2020:

My 98 Merc, went to jump off and correctly hooked up cables and tried to crank the van and the whole system went dead, no lights or anything else would work, what could be wrong?

Juvan on May 06, 2020:

My Mitsubishi Pajero 4d56A engine 1995 model 1 month ago replace new battery now my alternator out of smoke while engine is running the

I think the secondary coil will be burned or busted.

Keekee on April 27, 2020:

Bought a 2000 Chrysler 300m, 2days ago the windows,the signals and my ac stop working! What would the problem be? It's still crank, and it's drivable.

Larrt on April 27, 2020:

2000 Buick lesabre will start for a couple months then loses all battery power to start. No clicking.

Robert cook on March 02, 2020:

On my 2003 Hyundai Sonata it will start Run till warm Then it will die and kill the battery

Kenny hamby on February 12, 2020:

Ford Lincoln 1997 alternator goes out every three or maybe a month or so . don't know what it could be ?short some where????

Josephine Whitefish on January 30, 2020:

Hi. We have a 2001 Honda Civic and we installed a new alternator and battery. As we drive the interior and exterior lights die out. What is the problem?

Chris spindler on January 27, 2020:

04 Pontiac Sunfire trying to figure out where all the battery cables and under the engine wiring hooks up at somebody unhooked everything and never came back to hook back to where they go can anybody give me some help please?

Amy on January 24, 2020:

99 Toyota Camry with lots of miles Have to put in oil in it. Doesn’t smoke , isn’t leaking. 180,000 miles. Runs great. What is wrong with it & is is worth repairing

troy on January 07, 2020:

after replacing the headlight bulb and cleaning the battery terminals on my 2010 toyota yaris the battery would die after one day, i then replaced the battery and alternator, now for some reason after about 30 minutes of having the headlights on the dash lights go dim , any Ideas ?

Ladybug4413 on January 01, 2020:

On my 2015 Chevy Equinox a couple of months ago the radio went out then my bright light or my gym lights stopped working altogether the radio came back on the dim lights never came back on now it's telling me is throwing random codes it's telling me to check the starter system and it'll tell me to check the power steering system and then the auto theft light came on what is going on with my car please help

DANIEL on December 25, 2019:

what make a car to loose all electrical power on automobile

DANIEL on December 25, 2019:

what make a car to loose all electrical power

Billie on December 18, 2019:

I have a 2002 chevy impala 3.4l v6 base model. My blinkers, 4ways, AND highbeam lights went out. I knew it wasnt the battery because i had power everywhere else plus just got a new battery a week ago. So i checked the alternator and it was good. So i checked the fuses they were good. So i replaced the relay and the whole blinker switch. When i started the car after installing these i had no break lights which i did befor the installation. Checked that fuse it was fine. Checked my blinkers and still no blinkers but everything else had power. Now as of yesterday i now have no horn. Please help me figure this out. I cannot posibly think of anything but a wire problem could be the problem. HELP ME PLEASE!

mike hill on December 18, 2019:

my mothers car starts beeping non stop as soon as she turns on her light in her mercury topaz and figure out whats going on

Paul rineer on December 11, 2019:

Our 2003 caravan was running like crap.i replaced the alternator and coilpack.it ran like new for 2 miles than lost all electrical power then died.any help please

Charles Hazen on December 02, 2019:

I have a Chevy Silverado 2003,after jump starting a Honda Fit. My check engine light, ABS, and battery light comes on! It runs good and starts good! However well help what is the problem.

kowboy shade on November 16, 2019:

volt reg bad ground what year car

Sunday Athand on November 07, 2019:

I've changed 3 alternators and 1 battery in 1 month. The technician can't seem to figure out what the problem is. Please I need help. Thanks!

DelmarTillisSr on October 20, 2019:

I have 1977 Lincoln continental 6.6 v8

I just changed starter, alternator, voltage regulator, and purchase a Optima battery.

Still at night when running the lights and radio 20 minute drive lost lights on dash and headlight dim. In addition to seatbelt light staying on.

Made it home and tried to start but no power or crank.

What’s up?

Joe on October 19, 2019:

I just replace my batterie and alternator and when my truck its on idle my lights and daskboard dimms its that normal?

Daryl on October 06, 2019:

I have a 2006 jetta TDI I was driving down the road and it was like someone pulled the plug now I have nothing no dash lights nothing help thanks

Jamie on October 04, 2019:

I have to jump start my car every time I turn the car off . Even if my battery is reading 14.3 if I turn my Chevy equinox it will not crank up without a jump....


I can run my lights on bright with the radio and it does not bring the battery reader down. when this first started it would crank up the next day but not now.iv even noticed my radio stations or my clock did not need to be programmed after I cleaned my cables.

But it’s not the cables I bought new ones. Please if anyone can comment to help would b life saver!!!

Jason Carmichael on September 07, 2019:

My wife's 2004 honda odyssey wouldn't start. So i changed the battery and i tried to start it and it started right up but everything was reved up like i was stomping on the gas pedal. But i wasn't? What is the issue?

Chase schexnayder on August 29, 2019:

Ok so i have a 2003 chevy Tahoe. It starts but after about 10 to 15 minutes it starts to Sputter an then dies out.

I dont change the spark plugs the Distributor caps. Alternators fine new fuel filter new zeal pump cooling temperature sensor. New mass air flow sensor and a ground wire is still connected properly. But it still keeps dying

Ashwaan on August 25, 2019:

Hi iv change the ignition loom on my toyota conquest 2E bt nw it doesnt wana start only my battery lite goes on and my alarm works perfectly bt nothing else goes on help please

ron carlson on August 09, 2019:

I have a 98 Ford F-150. It does not have electric power 2anything when u turn the key on. I have a fully charged battery and cables r right! What’s wrong?

April on August 09, 2019:

Ok, heres my problem.. I have a 2001 Mercury Sable v6 3.0 and my car wont start. I have all dash board lights, radio works and headlights turn on. But there is a clicking when trying to start it. The abs, the airbag lights come on and off and rpms are bouncing between 1 and 2. Is this an alternator issue? Starter? Fuse? I dont have a clue.. can anyone help?

Brian on July 31, 2019:

My pick-up truck breaks down near my house. The engine loses rpm's and I have now power. When picked up by a tow truck and brought to their station, (3 times now) they drive it for days and it runs fine for them. What could cause this?

dude on July 25, 2019:


Mike on July 01, 2019:

what's causing my car battery to drain if I put a new alternator and new battery what's causing it

Pant on June 29, 2019:

The other day my electric loks on my 1997 lincoln stsrted goin on goinoff constantly e days later my ac quit working and the beeping noise that happens when u r low on gas or other wise keep beepin and beepin

Fiona on June 17, 2019:

I have a 2003 mustang GT it’s been stored for two years put a new battery in but have no power at all no lights ignition car doors won’t operate could this be a fuse when I first went to start all the electrical were working but t it wouldn’t start put the new battery in now nothing

Jen on June 16, 2019:

I have 98 jeep Cherokee my check guage light comes on n everything looses power n it's making a clicking noise battery is good n so is altenater what's the problem

Indira on June 13, 2019:

I have a Ford Focus 2000 while I’m driving in the morning my radio goes on and off

richard cline on June 08, 2019:

i have a 2005 chevey suburban 1500 196000 miles on it the problem is that the powerbcutting out the dash showing all the indicators shutting down looking like the car is off but the engine is still running and will run unles i turn it off. then when i get to the place i need to be turn it off and restarts ok. i am wondering if its the battery or the alt or part of my wiring. this has happen 3 times in 2 weeks and this is our primary car

Prynce on June 05, 2019:

I have a 05 mustang it has no problem starting but when it is started and more power is applied like the horn or headlights it will completely shut down. Brand new alternator same problem and i dont think its the battery

cathy on June 01, 2019:

I have a 2013 ford fusion and all the lights on my dash came on then everything just went black. Then when I tried to start my car it would not start so I had to jump it off and then it did all of the same thing but my steering wheel was very hard to turn. What do you think that this is.

Kathy dobbie on May 28, 2019:

2004 Licon Aviator won’t stay running longer then a half hour then shuts down altanator an battery are brand new

frank on March 27, 2019:

2002 Sebring sedan.....Battery is good and hold a charge. Alternator is steady at 14.1 volts......But the battery indicator light comes on every once in a while....Sometimes can drive 100 miles ok, other times it comes on in 10 miles. Always resets when I turn car off

Keep trying on March 19, 2019:

On many vehicles there is a fuse in the positive battery cable that goes to the starter. For example, in a 2003 Focus ZTW wagon there is an inline fuse in the positive cable and the connections on it can corrode. This will cause the battery to die while driving. Some have the fuse near the power distribution box. This problem will help flush several hundred bucks down the drain if your mechanic is a part swapper and not a troubleshooter. Good luck.

rauelb on February 25, 2019:

My truck doesnt hold a charge

My Name on February 09, 2019:

So many questions and not a single answer. And yet stupid people keep on asking. LOL!

Devan on December 31, 2018:

On my phone 2011 crown vic police edition...when the car is in park and the engine running turn on brights by pushing the windshield wiper knob forward the starter will engage turn brights off it will disengage but when but it in reverse or drive it will not engage the starter only with no pressure on the engine...anybody else had this issue

Aaron W. on December 24, 2018:

I replaced the alternator and battery on a 2004 Chevy blazer. It starts but won't stay started. What is the problem?

tom on December 21, 2018:

i have a murcury grand marceas itook it to the drug store and came out and could not start son drove me home

came back the next day car started to i did the same but to the back same thing both days it was raining today much harder cant start it .can you help me start my car?

Ronnie Abolucion on November 16, 2018:

What the problem of alternator stop the engine when positive cable disconnect

Alan on October 20, 2018:

I replaced the alternator in my 2002 Mitsubishi lancer ES and my light get very bright only when I let off the accelerator. Light inside the car also get much brighter. They dim back down when I accellerate.

J evans on September 26, 2018:

Car starts up but no electrical at all.alternator and battery test fine.what could the problem be?the car is a 1987 Nissan 200 1.8L.if it’s a bad ground where should I look for it?

John andersen on September 16, 2018:

I have 1995 Pontiac Sunfire I replace the alternator and battery and new coil packs ingtion all new but my car still dies what can it be

Pete on September 10, 2018:

How hard is it to get at the altenator on a 2000 Lexus..?

Craig Engle on September 06, 2018:

Why do my daylight lights work, but when I switch my lights on, they go out and the blinker lights stay on?

Eric Tarlton on September 04, 2018:

My 98 honda acorrd was losing power and i changed the altenator and battery and before the tack would die to zero when i turn the air on and when i put the hand brake on the all for door lights and brake light or on and when i let it down it goes away my battery dies seems like when the praking brakes it dies and cutts the car of and want start please help Eric easyduzit33@g.mail

Steve on August 21, 2018:

Went to turn on my car and there was no power whatsoever. Power door locks , lights, nothing . Car had no power . Then the gauges went crazy. Rpm , temp, gas gauge mph gauge all topped off! After about 3 minutes gauges went back to normal and car started right up. Does anyone know what this could be?

Jesse on August 17, 2018:

Why does my car lights go dim then car dies when I'm sitting at a stoplight for stop signs

Mike on July 15, 2018:

I have a 67 Satalite with a 1972 480 horse 360. I put in a new alternator, battery, and regulator. I can build engines but I'm a wiring idiot. When the car is of I have 12.4 volts. When I start the car, I have 11.5 volts at idle. As I rev the engine e I lose voltage. 1500 rpm I have 10.4 volts. At 2500 rpm I have 9.6 volt etc. The battery goes down after a few hours of driving. I have a MSD system. Any clues?

Rachel on July 03, 2018:

My car wouldn't start this morning. I used jump leads then drove it. When i stopped then got in my car to start it again it wouldn't start. Jump leads again but the same problem.

Would this be the battery or alternator?

James evens on June 05, 2018:

I tryed jumping my car after replacing the alternator and when jumping my car with jumper cables smoke came from the starter and the jumper cables started melting so what could be making this happen and just to put this out there I replaced the starter this time but not sure if he problem may still be there

Tau Maino on June 05, 2018:

My toyota camry sxv20, 5s engine I started the car and then to check the lights when I switch the lights on there was smoke coming out of the alternator so I turn off the lights and put the engine off remove the negative terminal after like 5mins I put back the terminal and tried to start it it couldn't start it was like battery was weak. Is my alternator already bargered or my battery is bagered?

Jacob on June 01, 2018:

Typically those older chevy trucks igntion switch or ignition rack/gear will be bad. Thats if its not turning over at all or sometimes.

Jerome on May 28, 2018:

I have bought a new alternator and a starter and a battery and it still will not start what is the issue

Frustrated owner Dave. on March 29, 2018:

I was driving my 1977 Chevy truck home from work one day on the highway all the sudden I lost all power and took me to the side of the road and died neck could never get started again might shine bright but when I crank try to track it over nothing happens just the headlight comes on but that it. I will not turn over or even make a clicking noise. Anyone know what the problem could be?

emma on March 29, 2018:

hi I need some help on what the issue could be, I have a Subaru liberty that all of a sudden the stereo stopped working and would work when you wound down the driver side window, and now my park lights wouldn't turn off until I took that fuse out. what could this be??

Cynjaz on March 27, 2018:

Hello, I have a honda 2008 accord (had it for two years) and this car has been giving me problems for the last year. I have changed the power steeting pump twice, crankshaft sensor once, the Knock sensor three times and both oxygen sensors twice. I was wondering if anyone is experiencing any of these isssues... for the last year about every 3 months or so, my car will take a bit to turn on. Once it is finally on, the AVS light will come on along with a flashing check engine light. Anywhere between 10-30mns after my car will loose power while driving, it will start jerking and will not go more than 5 miles per hour. We then changed basically everything we could possibly think of, at the time i was suggested to clean the oxygen sensors and put them back in there since it would be costly to be changing the sensors every three months and that seem to have fixed the problem. Well just a few days ago, we decided to replace both the oxygen sensors and sure enough by the following day my car started doing the same thing...jerking, loosing power etc.. my car is now at the mechanic shop and they are telling me that it can possibly be the fuel injector and there is two spark plugs that need to get replaced. has anyone experience this issue with the AVS light and check engine light? i also change the knock sensor last week, and that is the only code that we cannot remove. per the mechanic he believes besides the AVS+CHECK ENGINE that the car has a mechanical problem...he said that or the computer of the car is no good. Well as of today, he said he was testing the injectors and he moved the two spark plugs to the opposite side and now the computer shows different. I dont have too much detail since they are still testing the car but i just dont know what else to do with this car.

Patty Mcmahan on March 14, 2018:

I just had my car check for a code for check engine light that wouldn't read then car would not start then when it did it rest th odometer? 2002 beetle

Tom D. on March 13, 2018:

I have a 2003 Crown Victoria and the battery gage goes up and down and my lights get dim and bright, does anyone knows what this is? It's got a police intercepter in it if that makes a difference...??

Cartau07 on March 06, 2018:

i have a honda accord 2008 the car was not starting properly a week ago so i went and bought a new battery.

After i had put the new battery in the battery light signal appeared on the dash board. Today as i was driving to work the radio was on but as i was driving the sound went low so i turned it off as i got to work the car started to loose power when i pushed the accelerator.. i was just wondering if anyone knows what the problem could be? car was last serviced 3 or 4 months ago

Chandler Haider on February 24, 2018:

My 03-e150 van acts like the battery has gone bad but I noticed that if I move the negative cable like I was taking it off it car the van power witch allows me start it but sometimes it won't at all I just purchased a new battery but I'm skeptical about putting it in also sometimes when it starts the dash goes crazy showing low fuel on and off and the speedometer bounces but if I turn it off and try again it runs fine someone please help and reach out I've taken to several mechanics but they just rob me of my money and can't fix it

Emma Athey on February 24, 2018:

If my car sits 2 or 3 days it won't start, no lights no horn, nothing. When I jump it sometimes the heater will come on or my massage seat will come on. It is a 1999 Cadillac. It is a crap shoot whether the car will start again. What is causing this?

William Angle on February 22, 2018:

I have a 2005 Cadillac Deville (Base) with a North star engine and 220000 miles on it. All of a sudden when the car is moving forward the dash will reboot with all indicator lights (as if I re-started the engine) and at the same time all electrical systems have a momentary short, headlights and all lights blink, heater re-starts, every system. this will continue once every 30-seconds as long as the car is traveling (backward of forward) But does not seen to react to bumps on the roads or hitting a rough spot, the real issue is it can sit and idle for hours and not experience the issue. I have checked every fuse and eliminated most systems by pulling fuses and test-driving the car again, no change. Is this possibly an alternator voltage regulator, but I can run for hours parked, only when the car is moving do we get pulse about every 30 seconds and a car short - the engine continues to run through these momentary system shorts with no i please help me diagnosis this one

i love@gmail.com on February 20, 2018:

the car will not start when im in it but if anyone eles tries it starts is it bc im gay


April on February 02, 2018:

Car won't start I bought a new battery and still having problems I drive like 5 miles and the speedometer,odometer and gas all start going crazy then the car shuts off

Tonya Lawhorn on January 22, 2018:

I have a 1996 Chevy Silverado truck. It won’t start but when I open the door without even putting key in ignition The dashboard lights blink I tried to slow charging the battery and jumping it and it has a starter that’s the new on it

Stephanie on January 03, 2018:

I have a 2003 Honda Civic and my lights and everything went out and then of course my car stopped running and will not start back. Witch one of the problems do you think it may be??? Thanks

James on January 02, 2018:

I changed my battery. Now my emergency brake and my ABS light is on plus my battery light is on

josh marion on December 17, 2017:

Okay i was driving my 93 nissan altima and i got custom gauges in it and while i was driving it felt like it lost power then picked back up but when it picked back up it started smoking fro the custom battery guage in there and then there was like a pop and alot more smoke came out so when i tried getting it home and find out what was wrong with it. You hook up a battery and turn the key to start position i dont get no dash lights or nothing at all. What do you think could be the problem with it

Jake on December 14, 2017:

I have an 05 f250 with the 5.4 liter, all my dash board lights are on but every machine cant find a problem.

Julio on December 09, 2017:

I have an honda pilot o6 ex when i first bougth it short after a week i did a tune up later that day my check engine ligth came on for the first time since i had bougth the car it came out with catslyctin minimun tresshold etc...the guy told me to use 93 gas that it cant be the tune up and to use Mysterio .to clean my engine it seemed to work after another few months same code at auto zone i got upset i bouth the liquid again it disapered the next day it disapeare again it been like that for a while now it comes n goes so i figure i do t drive the car much maybe its my bad hamits of driving but a year after now my car battery came on my neeadles wonlndt move while i was driving every ligth came on n off twiking i got to panic n sed my car its done all i could think off is an expensive car fix i bougth a dionostic tool n 2 codes came by p0420..p0108 ...idk wat itsacly i would need to buy ,,,can i fix it my self ..or im i better of going to service mechanic. ..i just dont want to get riped again i have a feeling the tune up wasent do e rigth or old parts idk

Terrance Staton on December 06, 2017:

I have a 1998 Montero sport Im loosing power when the head lights are on when there off it starts producing power again Changed alternators same issue battery same issue some thing is eating my battery when the lights are on any ideas

Greg B on December 04, 2017:

I have a1999 dodge Durango, it runs great but after I turn off the ignition, I have to go pull battery cables off, because with in 20 Min the battery is dead this came all of a sudden one day went to the store came out it was dead nothing was left on once got a boost started right up, shut off again in minutes dead this is s new battery

Red on November 27, 2017:

My lights dim a little. I had my alternator checked and tested at 8.9 where it should be a 13 or above. How bad is this. I do a lot of driving after dark. Its a 2007 Kia Sorento

Terri Hope on November 21, 2017:

My radio goes off when I get to a stop sign or slow down. It's a 2004 Mitsubishi Outlander

Jake on November 16, 2017:

Just changed the solenoid and the starter on a 1989 F150. My problem is without the key in the ignition I can see the alternator moving when I go to jump it, any ideas of how to fix this problem cuz is draining my battery.

phillipamos on November 12, 2017:

My 2005 chrysler sebring. Battery is going dead during idle. I put on 3 new battery s. And 3 alternators. And wires going to battery and alternator and starter are good to. Also replace new computer. Battery only drains while running

I'm having the same problem antwan on November 11, 2017:

Im have the same problem antwan

Antwan on November 11, 2017:

I have A 2002 Ford Taurus SE in my battery died I replaced my battery in alternative in it's still dieing trying to see why my car dieing .

Mary on November 11, 2017:

I I have a 2008 Saturn Vue and when my car is in park my brake light is on my ABS light goes on and my RPMs go up and now my car won't crank what does that mean

Dalester on November 10, 2017:

My car never had problems. One day I left my lights on all night and killed the battery. Bought a new one cause it wouldn't hold a charge after that. It was great for a week, then when I would turn the A/C, all gauges in the car would stop working and the A/C would start blowing warm air. I don't know what the deal is. I had AutoZone check my alternator and they said it was fine. After that I left my damn dome light on and killed the battery again. Now it's doing the same thing but this time it is not fixing itself. No matter how many times I charge the battery, it still messes up when I turn the A/C on or have too much electricity going at once. If my headlights are on, forget. Everything quits working, but the car doesn't stall? Any idea would be soo appreciated.

Kristin on November 01, 2017:

I have a 2010 Accent, I was driving down the road and my headlights, power windows, windshield wipers, and heat stopped working. All the dashboard lights worked as well as the radio. I pulled over, turned the car off and on, everything was working.....any ideas about how to fix this?? Check engine light came on too.

Reychaparro on October 29, 2017:

I have a 2001 Honda Civic I have bought a new battery and a new alternator thought the alternator will have the problem I replace of the near three times and when I disconnect negative from battery car still shuts off what's the cost

Kip joiner on October 24, 2017:

I've got 2004 civic. Changed battery alternator and belts ran great for a couple of weeks. Now battery is drained what could it be?

Dwight on October 19, 2017:

I have a 2003 Taurus. At very random times my car will die. I could be driving down the road, on the highway, or parked in a parking lot. All my dash lights will come on, the car will click for a few seconds, then I will be able to fire it up again. Sometimes it won't completely die, but will click a lot and my rpm gauge will drop to nothing then will bounce back up to where it is supposed to be and over and over again before catching and continue running. Recently before I start it, I have to turn the key to start and it will click for 10 to 20 seconds before I'm able to turn it over.

I have a new alternator and battery.

Any suggestions?

Louis on October 05, 2017:

I have a 1998 Jeep Grand Cherokee Laredo yesterday got kind of hot outside so I turned on the air conditioner and I heard one pop noise almost like a backfire noise and then check engine light came on and I shut off the car and now it won't start. but when I give the car a jump start it will start but runs really shitty. after that I took a tester to everything and seems like the alternator is bad what would cause the pop noise and kill my alternator when I turned on my air conditioner?

Keith on October 02, 2017:

I have a 2011 Ram. On 3 different occasions I have gone out to start and everything is dead. I barely get the jumper cables on and it starts right up. Runs and starts fine for weeks, no issues. Battery is less than a year old.

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