OK, You say you have 12 volts coming down the grn/blk wire with key on. That's good.
The red wire from the fuse block, alternator term A, should be 12 volts at all times. YES?
Red battery at the alternator, B+, should be hot at all times. YES?
Grey wire should jumper from alternator term S to term S. YES?
If you can wiggle the wiring harness at the alternator, but it quits when you turn the car off, you're losing the connection somewhere at the grn/blk or the gray wire where they connect tothe alternator. I would look closely at the grn/blk conn. If this wire is bad, the wiggleing may make momentary contact to charge the fields of thealternator. It will keep charging until you break this connection, ie. Turn the key off. Hope this helps.
Tuesday, March 10th, 2009 AT 10:24 PM