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john aka eaut
john aka eaut, The Car Guy
Category: Pontiac
Satisfied Customers: 16008
Experience:  15 years as a auto tech
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I replaced my battery and alternator but the car

Customer Question

I replaced my battery and alternator but the car overcharging and battery light still on?
Submitted: 1 year ago.
Category: Pontiac
Expert:  john aka eaut replied 1 year ago.

A voltage regulator is wired into the current supply to the alternator to prevent it from receiving too much current, which would cause it to overproduce current.

The alternator used in this vehicle is internally regulated. The alternator is likely defective

I would replace the alternator