Question about 2005 Buick LeSabre

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I noticed the voltage indicator light on while driving is this thr battery or altenator

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The battery voltage while charging should not fall below 9,6 volts indicating charging problems

Posted on May 30, 2011

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Trouble shooting for battery light on for 1996 plymouth voyager


The battery light indicates the alternator is not charging the battery, keep driving and the car will stop when the battery runs out! Get the alternator checked!

Feb 13, 2015 | 1996 Plymouth Voyager

1 Answer

Mazda car battery pilot ight in front panel was found "On" while driving from home. After completing the journey and returning home, battery was found dead, ie could not start the engine. Why and...


The light you describe is not a pilot light, this is an indicator that the battery is not being charged (It comes on when you first turn on the ignition, before you start the engine because at that stage, without the engine running, the battery is not being charged. Its being on when the engine running is a warning that you have a fault).

Hence, the reason the battery was flat after the journey is because you used the power in the battery to run the engine, illuminate lights and indicators etc.

Causes for the syetem not to charge the battery are usually 1 of 3 things.

The fan belt that drives the altenator has come off. This belt usually drives a fan or power steering or both, so if broken, you would probably have other problems. - Check that the belt is on and not slipping

There may be a fault in the wiring, so your altenator is not charging. Check the plug on the back of the altenator and check around the general vicinity for damaged or faulty wiring

Most likely cause is that the altenator has failed. It may be repairable or require replacement depending on the fault.

Please add a comment to this thread if you need further guidance.

Aug 01, 2011 | 1993 Mazda 626

1 Answer

I have a 92 honda accord ex and my batter light comes on if the car is stitting still. if i go past 2500 rpm the light turns off. what could be the problem?


have the alternator checked. it could also be a bad voltage regulator but most commonly on any car its the altenator going out. below 2500 it dosnt create the nessary voltage to rechrge the battery. if you have a large stero system this could also be the cause. i would be more inclined to say altenator if you hear a winnig sound through the radio speakers or notice the headlights dim when the baterry light comes on. Good luck

Mar 21, 2011 | 1991 Honda Accord

1 Answer

My daughter is driving our old 1999 Saturn hatchback. She just called and told me the batter light came on when she started the car, then it starts to flash....The faster she drives, the more the light...


the battery light is for the altenator. It is possible that it is going out. The light comes on when the altenator is not putting out enough voltage to power the car...ie you need 12volts and it's only putting out 11 volts. the car will eventually quit running, as soon as the battery is drained to about 5 or 6 volts. the altenator can be checked. she should get back home as soon as possible.

Feb 08, 2011 | 1999 Saturn SL

1 Answer

Blinking battery indicator


the altenator will test fine although if they did not test with a voltmeter on the car reversing the voltmeters probes on the battery I would say the diode is at fault. when a diode goes bad and the battery is fully charged or new the voltage will look fine but the altenator will not charge as it should, a diode keeps the current from reversing which would be called a direct current as all cars have. if the diode is faulty the current will reverse becoming an altenating current a will not produce a charge to the battery

Jun 09, 2010 | 2002 Saturn L-Series

2 Answers

1996 BMW 328 IC Convertible Altenator ok but not charging battery


Sounds like the alternator may be missing an excitation current source.
Check the 'IGN' dash indicator lights when you turn ignition switch on prior to starting motor,
if not one of the below may be problem:-
1) check exiter control wire is connected to alternator D+ terminal (low current wire, +V with Ign on),
2) replace dash 'IGN' indicator lamp.

Jul 10, 2009 | BMW 328 Cars & Trucks

1 Answer

Battery and brake indicator light stays on after start


When the lights are on check the battery voltage. Should be 13.0 to 14.5. If you unplug the connector on the alternator when the lights are on, do they go off?

Mar 11, 2009 | 1994 Nissan Pickup

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