John Deere 420 was running fine when I pulled it out of the barn, Got off the tractor to shut the barn door, got back on to go and moved the travel lever out of neutral and the engine died. The engine restarts fine and runs, but once the lever is moved it will die. I have noted that the battery light is on all the time. I thought possibly the seat safety switch jumper that I installed some time back was bad, but have check and rechecked it numerous times and it appears ok. I and getting a ground reading on one of the wires leading from the seat safety switch. Took the seat tub off today and there does not appear to be any spots on the wiring from the seat to the engine compartment where the wire could be going to ground. I have a wiring diagram and can trace the seat wiring, I am getting a very strong ground reading on the wire from the fuse cartridge to what appears to be the Time Delay Control box. The wiring diagram that I have does show the dash amp light controlled from the TDCB. Is my problem in the TDCB, the neutral safety switch, seat safety wiring, etc.? Any help is welcomed. Thank You.