Mechanics

CAR BATTERY

1991 Oldsmobile Ciera • 6 cylinder 2WD Automatic • 142 miles

I've gone through all the checks for the battery system but all are right what else would cause the battery to drain over night?
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Aspenite
February 21, 2011.



You have to be sure the battery has a full charge or you can't do any testing. Check the charging system also.

If you have an excessive drain with everything turned off. Check for a lite staying on, best time to check is in the dark, trunk--underhood-- interior. You can take battery cable loose, use a testlite between cable and battery post, if lite come on birght, you have a drain. If the drain is on a fused circuit, you can pull/replace fuses one at a time, when you pull the fuse on the faulty circuit, the lite goes out.

JDL
Feb 21, 2011.