In Reply to: 12v charging posted by Tim Couch on March 30, 2023 at 13:33:27:
The light bulb might be enough to activate the charging system. Then again, maybe not.
What you need to locate, and minimize the playing around with, is a voltage regulator that excites at a low RPM. Then take apart the alt and replace the VR with the different one. Then it should work without fail.