Fuel tank wiring.

pitless

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Does anyone have a schematic of a '96 fuel gauge wiring with dual tanks? Both fuel level senders have quit a gauge pegs out at over full. I am suspecting the valve is leaving the circuit open but I don't know which wires to test. Valve switches from tank to tank just fine.
 

Crankybait

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******* out over full usually means the ground side of the circuit has been lost. The ground side should use a black wire. Mine was broken close to the tank, I added a piece in and connected to the floor under the truck until I can locate another rear harness that hasn't been butchered like mine.
 

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