[FrankF3]

You could also disconnect the connector going to the coil on the PTO clutch, measure what to get for resistance across the leads, THEN measure the leads - one at a time to ground. I had a 782 that was doing the same thing once. I found 1 lead that practically had 0 zero ohms to ground while the other lead had a resistance of the coil winding to ground. Since I had a driveway to clear snow from, I needed to get it running if possible. I ended up swapping the positions of the PTO coil wires in the connector. I figured if one wire gets 12V and the other gets ground, I might as well connect it so ground gets applied to the grounded wire and 12V to the other. If it worked (and it did), I was able to run it clear the drive and replace it once it came in.