The Stovebolt Site Forums The Shop Area The Electrical Bay Alternator/Generator Question

It sounds like you have a mixed system. When folks add aftermarket devices or modify modern parts to work, and do it half arsed, it tends to complicate things for other owners down the road. For instance, leaving the generator regulator on the firewall next to an alternator regulatore, using jumpers to make the alternator work, etc.
The 2nd car I owned was wired half for one year, half for another, & neither was the right year, I had to rewire it myself. My old dump truck was so fubar I ended up cutting the whole harness out and running fresh wires according to the factory diagram, THEN I made the needed changes to run acessories.

Honestly, if changes have been made to it, even with photos it can be hard for folks here to help you as it's impossible to chase wires via the internet. You should really have someone who knows what they are looking at poke at it & tell you what you have on your hands, then you'll be better able to ask for direction and get this rig rollin again.