The fuel gauge isn't working, someone has cut the wires and rerouted. I have replace some burnt wires and the fuse box. It was a mess. It wasn't charging now I have fire coming out of the rectifier on both sides. Hopefully solved that. To be honest with you I would like to have the entire schematic but the fuel will help for now. Thanks
Send a personal message out to member joecdeere to see if by chance he has the service tech manual for your JD 770 as he has been a great source for such help to others. In the pm, you can insert your email privately.