Charging system failure

Asked by Guru92NNL Jul 22, 2017 at 04:57 PM about the 2005 Pontiac Grand Prix Base

Question type: Maintenance & Repair

Charging system failure comes on and the
radio, a/c, shut down but the car still runs.
A mechanic tested the alt said it was
charging. He said it might be the ecm does
this sound possible?

1 Answer
22,300

Guru9FSV8 answered 6 years ago

Yes it does. Or a bad diode in the alternator. They can charge but not all the way or all the time with bad diode.

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