Ford 3930 Marelli Alternator wiring Tractor Forum

* This Ford New Holland 3930 tractor service manual also makes it easy to diagnose and repair problems with your machines electrical system. Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.. Power for the solenoid is supplied by a fuse. (listed as number 15 in the wiring diagram I have) The signal to energize said relay starts with the key switch and comes from both the ignition and accessory terminals. The ignition circuit goes through fuse #9, through a diode, and then to the coil circuit of the relay.

I have 4 3930 tractors and I will see what I have for wiring diagrams tomorrow at my shop.. Ford 4000 wiring I have a Ford 4000 3 cylinder diesel ive been trying to change the wiring harness on. As it is the tractor will start and run with no issues. But the fuel gauge and temp gauge doesn't work, and the light for the battery discharging stays lit. I know the gauges both work, and the fuel sender.