I have bee reading many of the posts and find them very interesting but I seem to have a similar problem to many other people but my problem is when the PTO switch to the mower is turned off, the 25 amp fuse blows. This happened after a sudden jolt to the tractor when the mower deck hit a cement block hidden in the grass. The blades didn't hit it just the deck. I have replaced the switch and no different. I have disconnected every possible electrical component, lights, TDCM, solenoid, clutch and a couple of others. When putting a meter on the switch the power wire feeds the wires to the clutch when in the "On" position, which is good. As soon as I put the switch in the off position the power feeds the other terminal which is a ground wire.
My switch has 5 terminals 2 seem to be constant power and not related to the switch at all, 1 is power to the switch itself which feeds the 4th. terminal for the mower and the 5th terminal appears to be a ground wire.
I have taken the covering off of some of the wire bundles and can't find any sign of freyed wires or burned wires. I'm really stumped on this one. Any help would be greatly appreciated. Have a great day folks!