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Bad Alternator: warning light stays on after ignition key is off... 200 1983

posted by  edmartz on  Fri Sep 17 16:46 CST 2004
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last visit: Tue Jul 21 17:04 CST 2009
[RELATED]

Hi!,

My symptoms are:

- The in-dash battery warning light stays on after ignition is turned off.
- Warning light goes from very faint to off, with engine running.

Did this test:

- Disconnect neg. battery cable
- Put test light between cable and post.

Result: Test light stays on until I disconnect alt harness.

That's how I concluded bad diodes.

Opinions??

Thanks,

Edwin







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    Bad Alternator: warning light stays on after ignition key is off... 200 1983

    posted by  someone claiming to be Allan in NJ on  Sat Sep 18 01:32 CST 2004 [RELATED]

    Could be a bad diode, but you at least have a couple good diodes given the alternator appears to be charging with the engine running. More likely, though, the problem is in the infamous biodegradable harness part of which includes some of the lighter gauge alternator wiring. Is that the original harness?

    All of us with '83's have struggled with and replaced this harness. It is very easy to replace, a wire at a time, just takes a lot of time!








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      Bad Alternator: warning light stays on after ignition key is off... 200 1983

      posted by  edmartz on  Sat Sep 18 17:19 CST 2004
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Tue Jul 21 17:04 CST 2009
      [RELATED]

      Thank you by your answer!,
      Today on a service shop change the diode pack of the alternator and now everything works fine!

      Edwin







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