I have a Deere X485 and the fuel pump will not start. All 3 grounds on ECU are good. Incoming power to ECU is good.
Fuel pump relay is not receiving ground from the ECU. I can jump fuel pump relay to frame ground and it will complete circuit and send power to the pump and pump will run fine. I have checked all wiring and put in a new ECU which did not help. Don't know if this is related but occasionally when I engage PTO switch the temp gage jumps to hot instantly. Disengage PTO and gage...
John Deere X485 EFI issue
Fuel pump relay is not receiving ground from the ECU. I can jump fuel pump relay to frame ground and it will complete circuit and send power to the pump and pump will run fine. I have checked all wiring and put in a new ECU which did not help. Don't know if this is related but occasionally when I engage PTO switch the temp gage jumps to hot instantly. Disengage PTO and gage...
John Deere X485 EFI issue
