Had been brush hogging, came home, backed tractor off trailer, started forward and she died. Ignition was dead. After inspecting fuses I found a blown 5amp fuse labeled Operational control unit/switched power relay. Although I know not recommended my seat safety switch is bypassed and has been for years. I replace the fuse, started right up, I backed it up engaging pedal with my hand so I could search for a fuse I had dropped. It idled probably 5 minutes, I then got on the seat, started forward and it died. Same fuse blown, replaced it again, let idle several minutes, got on, went back and forth, then parked it in the shed. Mysterious to me, anyone ever experience anything like this? Not really sure what the switched power relay is, could it be the same as ignition relay?