Mechanics

CHEVROLET CAVALIER BATTERY PROBLEM

2003 Chevrolet Cavalier • 90,000 miles

Car is a 2.2 4 cyclinder will start and runs good until you turn on ac, heat, lights or defrost. It will lose power or die completely. Do not know what to check, please help.
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Guest
February 26, 2013.



Have ALT output checked

Docfixit
Feb 26, 2013.
Have the charging system professionally load-tested. The typical generator is designed to develop up to 90 amps. If all you can get is exactly one third of that, and "ripple" is very high, it has a defective internal diode. To prevent a lot of repeat failures, replace the battery at the same time unless it is less than about two years old.

Caradiodoc
Feb 26, 2013.