Thread: Battery Light comes on when I accelerate
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Old 09-19-2012, 01:24 AM
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onehundred80
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Default Re: Battery Light comes on when I accelerate
Originally Posted by chrisparker85
Alright after checking the voltage the battery light would come on as soon as the car hit 2000 RPMS it would also lower the voltage to 12.2 to 12.3. However I tried this after i got home. Today when i started the car after work the battery light stayed on and didnt go off until 12 miles later. Pep Boys tested the Alternator and the battery and said they were fine but it seems like the alternator isnt charging the battery the way its supposed to while driving it?
Have you inspected the cables and grounds at the battery? There may be corrosion that may not be visible even inside the insulation.

If the voltage drops it may mean that the supplied battery power is too low when the car needs more power. This may be due to poor wires not capable of carrying that voltage.
Not enough power makes it to the battery so the alternator supplies the need directly.
 
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