Question about 1989 Buick Regal

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Battery being drained. Maybe be relays

Where are the electrical relays located on the car?

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Most likely the diode from the alternator is leaks draining the battery. If you believe your battery is good: 1- Disconnect negative cable from the battery over night to see how weak it is in the next morning. If it is bad then it is the battery no other thing. 2- If it is good, take off wires from the alternator for a night, next day battery is still good then there is a problem with the alternator diode. Hope this can help.

Posted on Nov 19, 2009

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