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?
Feb 21, 2011 at 5:30 PM
car battery
1991 OLDSMOBILE CIERA
ASPENITE
- MEMBER
- 1 POST
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JDL
- ✓ASE Certified Mechanic
- 16,098 POSTS
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.
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.
Feb 21, 2011 at 5:40 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.