CAR IS A 2

2003 Chevrolet Cavalier

Tiny

Anonymous

February, 26, 2013 AT 7:24 PM

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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2 Answers

Tiny

Docfixit

February, 26, 2013 AT 7:26 PM

Have ALT output checked

Tiny

caradiodoc

February, 26, 2013 AT 7:28 PM

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.

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