mfreund
Veteran Member
I looked at the wiring diagram and the power goes from fuse f 5 to the guage and then to the sender. The sender a variable ground dependant on temperature. Check to make sure that the ground from the motor to the frame is good. I still think the problem is in the sender or a ground problem from the engine to frame or frame to battery. It is very strange it only does it after the tractor has warmed up.
Unplug the sender and hook a wire from the white wire and touch it to ground and watch the guage. It should go full hot to full cold with grounding and ungrounding. If it does, the the problem is not the guage.
Keep us posted I am curious.
Unplug the sender and hook a wire from the white wire and touch it to ground and watch the guage. It should go full hot to full cold with grounding and ungrounding. If it does, the the problem is not the guage.
Keep us posted I am curious.
