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62 Posts
I'm having a bit of an issue that I can't figure out with my charging system, and it seems to be a little different of a situation from any other thread I've looked at. I just got a new 1980 rabbit pickup, and when I got it the PO was driving it around without a top mounting bolt on the alternator so it was shaking itself apart. That messed up the windings on the inside so I ordered up a new alternator. I've got it installed in the truck but it doesn't charge. BUT, it will start charging if you jump 12v to this M, or W, or motorola logo post the the suppression condenser (red circle).
You only have to jump it for a split second and it will keep charging until you shut it off.
All grounds are new and connected properly (battery to frame and to trans mount, as well as alternator to the engine. The blue wire has no short to ground anywhere. The battery light on the dash comes on with the key, stays on once started, even with a blip of the throttle, and won't go out and start charging until jumping 12v to that post.
Anyone have any ideas of what the problem could be? Any help would be greatly appreciated! Seems like an issue with the exciter circuit but I can't find anything wrong with it, with the exception of something internal to the alternator. If I can't figure this out I might just run a jumper from the starter solenoid to this post on the alternator so it gets jumped just when cranking.
You only have to jump it for a split second and it will keep charging until you shut it off.
All grounds are new and connected properly (battery to frame and to trans mount, as well as alternator to the engine. The blue wire has no short to ground anywhere. The battery light on the dash comes on with the key, stays on once started, even with a blip of the throttle, and won't go out and start charging until jumping 12v to that post.
Anyone have any ideas of what the problem could be? Any help would be greatly appreciated! Seems like an issue with the exciter circuit but I can't find anything wrong with it, with the exception of something internal to the alternator. If I can't figure this out I might just run a jumper from the starter solenoid to this post on the alternator so it gets jumped just when cranking.