Question about 1988 Cadillac Sedan DeVille

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1988 Cadillac DeVille lights flickr while driving when the car is cold with new alternator

The battery is good and the alternator is charging properly while running with lights on and the air on high and every thing on high or on. What would cause the headlights to flickr i dont notice it in the dash at all i just notice the headlights and the have a good ground and good power wires also.

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Check the connectors and the head light ground straps near the headlights

Posted on Nov 02, 2012

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Posted on Jan 02, 2017

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SOURCE: car is making loud high tone while driving 1992 cadillac deville

your water pump may need to be changed. have a trusted mechanic check it. the water pump is connected to the drivebelt of your 4.9 l engine, and if thats where the sound is coming from you can be pretty certain

Posted on Aug 10, 2009

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SOURCE: 1999 cadillac deville concours AC problem

on my 99 devillle concours cold air blows from left and back vents but hot air blows from right vents

Posted on Aug 19, 2009

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1 Answer

Fix 1997 cadillac deville concours charging system


Charging voltage should be around 14 volts or more for battery to be properly charged. If significantly below that the alternator is not working properly.

Sep 05, 2017 | 1997 Cadillac DeVille

1 Answer

1993 cadillac. I'm having trouble with the charge light coming on, only at night causing the headlights to go off and on. been pulled over 3 times now. The battery is new, had alternator tested and te


Could one WHAT be overcharging the other WHAT???

To understand the problem you must first understand that the car runs off of the BATTERY. The job of the alternator is to replace the power that the car uses back to the battery. The car DOES NOT operate off of the alternator (many people do not get this). The charge light comes on when the charging voltage from the alternator is lower than the voltage that is available at the battery posts (that is why the charge light is ALWAYS on when the ignition switch is on but the engine is not running.

If the CHARGING SYSTEM had been PROPERLY tested, you would have seen this in the tests. If you removed your alternator to have it tested, this does not test the charging system in the car.

This can be caused by a failure or high resistance in ANY PART of the charging system. This includes not only the battery and the alternator, but also all of the connecting cables, wires and the ignition switch.

If the battery and alternator are both good, then the problem is most likely a loose or badly corroded battery cable. However, high resistance in the ignition switch circuit to the alternator can also cause this type of problem. The charging system in your car needs to be PROPERLY tested to pinpoint the location of the fault.

Dec 03, 2011 | 1993 Cadillac DeVille

1 Answer

I have a 1998 Cadillac Deville. I replaced the battery, and alternator. Its still not charging properly. The service charging system light is on on the dash. Can you tell me what else could be wrong?


Sounds like a faulty voltage regulator to me.Start the car and take a multimeter and check voltage coming out of the alternator it should be 14-14.6 volts if its not within these specs take alternator back and get a new one.

May 15, 2011 | 1998 Cadillac DeVille

2 Answers

1998 Deville info system is saying battery is not charging


Check for the terminals for the battery and the alternator first. The alternator may not also be delivering current properly. Check the belt drives. Other than that it may be a bad alternator.

Apr 08, 2011 | 1998 Cadillac DeVille

1 Answer

My alternator is good & my battery still gets drained


How old is the battery? I learned at Sears while working there in the battery department that the average life of car batteries is about 3 years. So, after that, batteries lose a significant amount of their performance CCA or cold cranking amps, and may have to be replaced on a pro rated basis after that period of time, on average.


I put a diehard platinum battery into my 1997 Cadillac Deville Limousine for about $189.99 plus tax and it has a 4 year replacement warranty due to bettery construction.

However, if you get Walmart's best Maxx battery, they have a 3 year replacement policy and they charge about $79.99. I put that into my 1990 Cadillac Deville.

Good luck on resolving the battery drain problem with a good alternator.

Dec 18, 2010 | 1998 Cadillac DeVille

1 Answer

1988 sedan deville cadillac runs good until


Sounds like the battery is weak or the alternator isn't providing enough amps to keep the engine running and power the lights at the same time.

Dec 04, 2009 | 1988 Cadillac Sedan DeVille

3 Answers

1998 cadillac deville


Yep, check or change your alternator.

Aug 26, 2009 | 1998 Cadillac DeVille

1 Answer

Installed new alternator and car battery still will not charge.


did you unhook the battery prior to installing the alternator

Jul 12, 2009 | 1996 Cadillac DeVille

1 Answer

My 1988 Cadillac Deville has a new battery and alternator but still looses charge over night,Checked lights everywhere none are on at night??? why does it still discharge??


A 12V battery drain, doesn't necessarily mean a bulb is on. There could be 17,842 other reasons such as a sticking seat switch, blower motor staying on, I could go on. Need to have it tested for that,and identify the circuit with the drain on it. Then beginto search and see what is the cause. Hope this helps

Apr 10, 2009 | 1988 Cadillac Sedan DeVille

1 Answer

Dead Battery After 2 days


Check things like glove box ,boot or centre console lights. Also while recharging battery with engine cold feel alternator for any heat. Does alternator charge?

Jun 15, 2008 | 1992 Cadillac DeVille

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