Can someone tell me which green wire on the back of the alternator does what? I have 12 volts at the large wire from battery but nothing on the small plug with green wires. I thought one of them should be hot with the key on. Thanks!
Thanks. I will check that out. Can you put that "excite" wire on a separate keyed power source? It is strictly off road use only jeep.
It starts and runs fine. No miss or anything. Everything works but the alternator. That's why I was asking. I didn't know if it would charge if I did it.
I'm going to take it off and have it checked out. Does this seem like an ECM problem to you?
I had the alternator checked and it was fine. After you start it about 20 seconds later volt guage drops to 0 and "check guage" light comes on.
That diagram is not right. Full fielded alternators on Chrysler stuff can put out upwards of 17 volts. If it's ground controlled and the pcm has lost the driver internally, you can put in an older dodge external voltage regulator, but it's probably easier to get a junkyard pcm. I don't have a diagram handy, but if you jump the ground controlled field wire to ground momentarily, you should see the battery voltage jump if the pcm is not co trolling and everything else is working.