CAR IS A 2

  • Tiny
  • Anonymous
  • 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.

Tuesday, February 26th, 2013 AT 7:24 PM

2 Replies

  • Tiny
  • Docfixit
  • Expert
  • 18,993 posts

Have ALT output checked

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Tuesday, February 26th, 2013 AT 7:26 PM
  • Tiny
  • caradiodoc
  • Expert
  • 25,616 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.

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Tuesday, February 26th, 2013 AT 7:28 PM

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