Question about 2002 Buick LeSabre

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How can you tell if a battery or alternator needs to be changed

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If u dont have a battery tester autozone can test it for free or most of the part stores

Posted on Feb 13, 2012

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1 Answer

Changed alternator,and the battery light is still staying on,why.


get the battery tested at a car battery testing place it will tell you if battery is crook or alternator is crook.

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I have a 2002 mustang and it is making a squeaking noise and the battery light comes on. Both happen intermittently but I haven't had any change in the battery gauge. Do I need a new alternator?


the sound is either the alternator belt (as in way too loose), or bad bearings in the alternator and it seizes up intermittently and the belt screeches as it slides on the pulley. your gauge is telling you the amount of voltage at the battery, but the light is a charge indicator and it is pointing you to the alternator.

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97 ford explorer battery reading low change battery change alternator


Take it to Advance auto they do a system test for FREE that will tell you what needs to be changed. Or you can check it just start it up unplug battery if it stays running then the battery is bad. If it shuts off then its the alternator.

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How can you tell if the alternator is bad or if the belt has to be changed


The belt is obvious

You change that, as you always have on any vehicle
Every 4,5,6 years ,whatever you feel like

The Alternator, you put a volt meter across the battery
terminals & start the vehicle
You need 14 volts to charge a battery to 12.65 volts

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1998 VW Golf battery was replaced and battery indicator light will not turn off


Its telling you that it probably wasn't the battery but that there is a problem in the charging system. Have your alternator checked. good luck

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Battery warning light just started coming on, Mazda 2006 Tribute.I've had her for 39,000 miles/40months. Do I just need a ust need a new battery, or is there any history of electrical problems with the...


a battery waring ligth is not telling you that the battery is defective, it is telling u that the battery is not being charged by the alternator, have the battery and alternator tested to determine th4e cause, a failing battery many times can damage the alternator as it causes it to overheat, so if the alternator is in need of replacing then it is very important that the battery be fully charged and tedsted prior to installing a new alternator if indeed that is the final diagnosis.

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1 Answer

I have a 2000 GMC safari and my battery light came on but the van runs fine does this mean the alternator is fine and i need to change my battery or is the alternator gone bad


that is telling the voltage is ether to high or to low i know that autozone has a free test for battery and charging system i would have it tested

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