Aaron, Thanks for the link. It looks like what you are doing is establishing the polarity of any iron in the system. I was not aware of that need. I suspect that is OK on my system as it charges a little, just not enough. The guess of the regulator is probably a pretty good one. I tried to pull the cover to check the contacts and it seems to be installed with rivets. I have a spare but it has a welded contact. I also have a spare generator of dubious functionality. I'll just have to keep peeling the onion.