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square body dual fuel tank wiring

18K views 4 replies 5 participants last post by  RatsMC  
and last, maybe im thinking too much, but what tells the gauge how much fuel i have?
Not sure which wire but it starts at the height sensing device (the float in the tank) which changes resistance values. Wired up to the fuel gauge which is calibrated for those values.

If I remember right the cab mounted selector switch is the place it swaps for that reading.

We have the electrical manuals in the FAQ, so you dont have to go far. I'd look it up but dont know the year of your truck?