My Farmall cub has a short. I have replaced the starter the coil and the battery. When I pull the starter lever I can see it spark at the plunger. I also replaced the 12volt from 6 volt restrictrer (not sure what it's called but it was smoking)all to no avail. When all is hooked up and I try to start. There is dead silence not even a click. Any ideas will be appreciated. I know this is tough one because it could be just about anything. But I am at wits end. I don't see any frayed wires. What could it be? P.S the fuse is good and does not blow. Of course I unplug everything so not to short anything else after each start attemp.