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Old 06-23-2004, 22:05   #1 (permalink)
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Alternator reverse current draw?!

Was wondering why my alternator seems to be drawing current in the reverse direction when the engine is not running?? My battery was constantly being discharged when the car was left overnight. Ive disconnected the BW wire from the battery and now the battery is still chanrged. The BW wire goes directly to the alternator regulator connector.
Is the diode pack stuffed? How come the alternator is still putting out 14V?

Any ideas?

Brent
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Old 06-23-2004, 22:58   #2 (permalink)
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Re: Alternator reverse current draw?!

Could be the regulator, It's not an expensive part... normally, so try replacing that first and see how you go.
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Old 06-24-2004, 02:04   #3 (permalink)
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Re: Alternator reverse current draw?!

I think you'll find that by disconnecting alternator +ve at the battery you've removed a high resistance point (leak) which may be actually at the fuse block. This is much more likely than reverse biasing the rectifier diodes! Pull your fuses out and use contact cleaner on them. Check the wire terminals for shorts to ground. rectifier assemblies can be expensive.
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Old 06-25-2004, 00:57   #4 (permalink)
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Re: Alternator reverse current draw?!

igntion... I dont understand what u mean? Ive been disconnecting this wire everytime i turn the car off (got an alligator clip on it) There is no power from the alternator when i have it off and the engine running. In the original post i said the alternator is still putting out 14V. Its actually putting out around 16V. Where is the fuse block? ITs like the BW wire is shorted somewhere. I fort it may have been a short in the regulator.

Thanks
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Old 06-26-2004, 16:43   #5 (permalink)
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Re: Alternator reverse current draw?!

Had a similar problem years ago. Turned out to be a crook diode in the alternator. Cheap to fix though. Does your alt light on the dash light up with ignition off?
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Old 06-26-2004, 18:30   #6 (permalink)
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Re: Alternator reverse current draw?!

No, with ign off the globe is off. The globe works tho... Maybe it is a wiring
problem somewhere?

Brent
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