Subject: Re: Alternator drain? by Durango_Boy on 2009/2/10 13:12:04
Quote:
Matatk wrote: Being at 13.2 while on a trickle charger doesn't necessarily mean it's good.
But you still didn't say when it's dying. If while driving, that could be an indication that the alternator is bad. But remember, the alternator's job is not to charge a dead battery, so if it dies overnight, that could be your problem. You need to give us more information.
Matthew
I agree. Take your battery to a local parts store and have them do a full charge and a load test. It takes about an hour so drop it off and go back. Batteries can go bad but still show a normal voltage.
I would also have the alternator load tested at the parts store. It may have a bad internal regulator or diode pack.
Do you keep the car in the garage? With all the lights off at night stand in and around the car looking for light. Sometimes storage compartment lights can be stick on draining the battery and you'd never see them during the day.
Factory alarm systems have also been know to cause a problem when the relays go bad.
