Charging system troubleshooting

Mattax said

Not sure what you thought that does.

This is a rough schematic of the regulator.
Important thing is the regulator uses the system voltage measured at the feed wire (blue) to allow power through the rotor.
If you jumpered the two wires together, then you created a short circuit to ground.
View attachment 1715363353

Click to expand...

After reading your reply, i went back to the earlier threads and realized I missed a critical step in #6. After jumping the VR connector, then disconnect the blue ign wire from the alternator and ground the FLD. This will full field the alternator using the green wire and VR IGN terminal for source (direct from the thread). Wow! At 2000 rpm the Alt is putting out 20V and pegging the ammeter +. The test isolated the issue but I'm frustrated that I don't know what I'm seeing. I get that jumping the VR puts 12V on the green wire but i'm not connecting the dots on why grounding the IGN puts the alternator in full charge.
I assume the issue is in the VR.