With most gauges the sending unit grounds the wire going to the gauge. It sending unit varies the resistance to ground and that's how it makes the gauge needle go up or down. The higher the float is in the tank, the more resistance the sender makes and the higher the gauge goes. Remove the wire from the sender and see what the gauge does. If the gauge goes to empty with the wire off the sender the sender is shorted out. If you touch the wire to a ground it should peg the gauge. If the gauge still pegs with the wire off the sender the wire might possibly be shorted somewhere between the sender and gauge. If the wire to the sender is good, someone else on this forum is gonna have to help you out. Jim
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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