Originally Posted by SEAL
AeSix, I will give you the same advise I always give on wiring diagrams. For 10 cents a page you can copy great wiring diagrams at your local library. Most libraries have subscriptions to some auto manuals on line or professional books on the shelf.
I will get another diagram. Like I said, it confused me and I'm experienced in electronics. Far too much is not shown in the diagram.
Another test I did today was to check wire resistance and continuity. The battery voltage, with truck off was 12.2. When I started it, the voltage dropped to 11.3. I used a DVM to measure voltage from the Bat- to the Alternator RED connection and battery voltage is present (11.3 +/-). So the path is good. It's the same at the input to the VR so that path is good. The voltage dropped across the wiring is about 300mV. It's beginning to look like the problem is the output of the VR or the field windings or wiring between the VR and the Alternator on the VR output side. I'm going with the latter for now, since the VR and Alternator have been replaced, while trying to fix this problem, so they are new. But I'm sure I cnecked continuity between VR and Alt already. I guess it never hurts to check more than once.
Hopefully a new wiring diagram will clear things up.