On my third regulator and still have the short when the B+ wire is plugged to the regulator with the stator wires attached and the ignition switch is turned to the run position. Stator checks out OK with 27.9 V AC at full throttle. Light switch and attachment switch are both unplugged. B+ wire does not show a short when checked end to end. With the B+ wire and one stator wire attached to the reg. it is OK. As soon as I touch the second stator wire I get the short.
These are aftermarket regulators so the terminals are 3 in a row and not two on top and one on the bottom. With this configuration I can plug the B+ in the right terminal and the two stator wires on the other two and do not get the short. Afraid to start and run the engine that way in fear of blowing the stator and/or regulator. I have thought about rewiring the whole tractor, which isn't that much but I don't think I would gain anything. Open to any and all suggestions.