Gas Gauge Wiring Diagram For 1985 Ford. 5132019 91422 am. Never hook the sending unit or gauge to a 12 volt battery.
Automotive wiring diagram worksheet inspirationa fuel gauge sending. But once i swith to my front tank my truck. Unplug the sending unit and with the key on engine off ground the yellow white wire yellow wire white tracer stripe ground the wire then remove the wire from ground while watching the gauge if the needle moves then the problem is the sending unit in the tank or the sending unit ground black wire.
The fuel gage works on the principle of a controlled ground so the wire going to the sending unit is really a grounding wire.
The fuel gauge is a fairly simple electronic. 1985 f150 shortbed gas gauge not working. Most gas tank units consist of two parts the gas gauge mounted in the dash and a tank sender mounted in the tank. The gauge should peg full.