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post #1 of (permalink) Old 05-30-2002, 06:25 AM Thread Starter
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Too Much Alternator Ground ?? (not on a Jeep)

I just replaced the alternator on my 84 2.2 Turbo Laser daily driver. Now it won't shut off unless I disconnect the factory ground lead to the alternator. This was a straightforward swap with no other problems. I'm reasonably certain that I got the correct replacement alternator and it was replaced due to a noisy bearing not an electrical problem. The new alternator charges fine with the ground wire attached but turning off the key has no effect - everything including accessories continues to work just fine. Without the ground wire connected charging amperage drops off too far to just leave it disconnected. This is the factory ground wire not some homade addition.

Hey?? What happened to my SIG????????
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post #2 of (permalink) Old 05-30-2002, 06:41 AM
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Re: Too Much Alternator Ground ?? (not on a Jeep)

Hopefully TeamRush will answer because I don't think anyone else will touch an electrical, ignition or charging question with a 10' pole.
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post #3 of (permalink) Old 05-31-2002, 01:12 AM
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Re: Too Much Alternator Ground ?? (not on a Jeep)

I'm surprised no one told him to put an HEI ignition in it to fix the problem...

If you have the little Nippon-Denso alternator, one of two things is wrong.
1. Your 'Rebuilt' alternator is defective.
2. You have two wires reversed, the excite wire and the rotor wire.

My bet is they used a bridged rectifier and someone reused a cracked insulator and you are leaking power to ground.

Make sure the case is getting a good ground, don't rely on the bracket.
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