Here's another one, Bob Melvilles wiring diagrams. This is what I used when I rewired my COOP E3. I put a generator from a JD M on it and used a regulator instead of the generator cutout that came on it. On an Oliver 88 I put an alternator on it using Bob's diagrams. Both situations worked great. On the E3 you can see where I mounted the VR on the bell housing. By putting a shorter belt on the Oliver alternator it fit under the side panels. Never had to rev the engine to start the alternator charging either. If you want a diode email me with your address. I no longer do full size tractors, no room.