John Deere fuel gauge.

[DABSGT]

The fuel gauge on my 855 doesn't works. Stuck on full. When key is off registers empty key on jumps to full no mater what is in the tank. Any ideas where to look?

[Oldtractorfixer]

My first guess is that the wire to the tank has a short. Disconnect the wire at the tank if it stays at E the bad sender. if not disconect wire to tank at the gauge end if now stays at E bad wire. If not bad gauge or something in dash.