2003 Chevrolet Cavalier Car 2 2 4 Cyclinder Will Start Runs Good Until You Turn

2003 CHEVROLET CAVALIER
90,000 MILES
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ANONYMOUS
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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.
Feb 26, 2013 at 7:24 PM
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DOCFIXIT
  • CAR REPAIR CONTRIBUTOR
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Have ALT output checked
Feb 26, 2013 at 7:26 PM
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CARADIODOC
  • CAR REPAIR CONTRIBUTOR
  • 34,309 POSTS
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.
Feb 26, 2013 at 7:28 PM
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