I got my Farmall 100 that I picked up at an action this spring and have a question about the 6V system charging. Had the generator checked out at a local shop and they said it was good but needed a new regulator. Bought a regulator from the same guy and the tractor charges fine at about half throttle. At full throttle the gauge goes nuts and flutters all over the place. Was wondering if I could have a bad connection or ground problem. I haven't put a meter on it yet to see if it does the same thing. Guy sells good quality regulators. I've had him fix other generators and alternators so I know he knows what he is doing . Could it still be a regulator problem.