Question about 1991 Cadillac DeVille

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The charge light comes on when i turn on the heat and other accessories.like the lights,Radio when driving down the road with no accessories on at all the charge light does not come on at all For 1991 Cadillac DeVille

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Your alternator might be failing. Get your charging system tested, as you can destroy a battery , or you will get stranded if you don't.
Normal battery voltage is 12.5 not running, and 13.5 or so running. If's it's lower running, you are not getting a charge.

Posted on Nov 17, 2009

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Make sure you batt cabes are tight if they are its prob a bad altnator have auto zone test it for free

Posted on Nov 17, 2009

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2 Answers

What is wrong when the battery light comes on while driving?


The battery light comes on when there is an issue with the charging system. Likely your alternator is no longer able to keep up wth the accessories that where on and the charging voltage was dropping to about battery voltage. This is pretty easy to check with a voltmeter. Check voltage at the battery terminals. With the engine off you should see around 12.4 volts. With the ingle running and all the accessories turned on you should see more than 13.5 volts and closer or more than 14 volts would be ideal. If you don't have that than it's probably time for a new alternator.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Mar 01, 2015 | Cars & Trucks

1 Answer

My 2003 dodge caravan is slowing down at stops when heat, radio, lights are on. I replaced alternator and its still doing it. What could it be


Was the battery checked, if not check if for any dead cells., and make sure its taking a charge. A bad or weak belt tensioner may be causing the problem.

Jan 26, 2015 | 2003 Dodge Caravan

1 Answer

My plymouth, voyager turns off while I'm driving it down the road..


Just an Idea. When it dies next time check the relay temperatures, if you can. Once I had a fan relay which would over heat and the radiator fan would not work. After relay cooled down it would work(This usually happened when I was stuck in traffic). Could be a fuel pump relay. If relay is a lot hotter than the other relay could be bad relay. My thought is it will not cost you anything to try it. I think it may be something electrical over heating. 30 years ago my thought would have been the coil, when the coil started going bad it would heat up and the car would die till it cooled off.

Nov 18, 2017 | Cars & Trucks

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How do i know when my alternator is going bad


If the batt light is on, the alternator is not charging the battery.
If the battery won't hold a charge, it could be failing.
If you are having a specific problem with your PT Cruiser or Mustang, let us know what it is.

Dec 18, 2012 | 1994 Ford Mustang

1 Answer

Brake light and battery light come on as I'm driving down the road


This is common on this nissan when the alternator goes bad it will turn on these lights and sometimes even more dash lights will come on, check and make sure the belt is on the alternator and didnt come off next check the battery connections and the connections at alternator. have the charging system tested, this is a quick test and will test the battery and alternator and starter, you will see that the alternator is not charging good and need to be replaced, take note that when the battery drains down the car will stop running and you will be stuck out on the road, it sounds like its on its way out , good luck, hope this is helpful.

Feb 12, 2011 | 2003 Nissan Altima

1 Answer

Lights dim while driving down the road radio shorts out


SOUND LIKE ALTERNATOR NOT CHARGING.CHECK ALTERNATOR DRIVE BELT COULD BE SLIPPING NEED ADJUSTMENT.IF BELT TENSION OKAY CHECK ALTERNATOR OUT PUT AT BATTERY.SHOULD BE 13.5 TO 14.5 VOLTS.IF NOT ALTERNATOR FAULTY ALSO CHECK ALTERNATOR FUSE.DUE TO RADIO LOCK OUT FEATURES FIRST TURN OFF RADIO BEFORE REMOVING NEGATIVE BATTERY CABLE BEFORE REPLACING ALTERNATOR.

Nov 23, 2010 | 2006 Hyundai Sonata

1 Answer

Cruise control light will not come on after truck warms up 2004 dodge ram pick-up Cruise works ok when first using it , after driving to my destination, shutting off the truck. 15 min later driving again,...


After the light goes out does it come back on while driving down the road?
If it does this sounds as if you may have a heat sensitive problem at the cruise motor. this has a sensoe that turns the light on when it is engaged. when you turn it off and sits a while does the heat under the hood goes higher expanding the circuts an open circut. You may have to replace the board in the motor.

Aug 19, 2009 | 2004 Dodge Ram 1500

1 Answer

Charging System Failure Light


This is a common problem with these cars. I have had it come on also a couple of times. No need to worry unless it stays on.

Jan 15, 2009 | 2004 Pontiac Grand Prix

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