I have a 1950 Ford 8N 6 volt positive ground I'm trying to fix up and I have a charging issue. The issue is that the ammeter read all the way to the - negative side of the ammeter so i checked to see if the generator was charging and it is, up to about 7.4-7.8 volts+ from 6.4+ volts. I put a new voltage regulator on it and energized it by touching the bat terminal to the field terminal on the VR. I know now that I messed that up. The ammeter then read maximum + to the right side. The ammeter goes back to the maximum - side when I turn the tractor off. I put a new VR on it this morning and the ammeter reacted the same (reading positive + all the way to the right side}. I energized the new VR (no spark was seen) and nothing has changed. Please help.

Mike, your charging system is working based on your voltage when running. Do you have another ammeter you can swap in to see if the problem is with your current one?