Gas Guage wiring
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From: Brockport USA
Gas Guage wiring
My 79 F250 Wrecker has an old style gas tank ( Vertical, behind the Seat Kind) mounted outside between the Cab and Wrecker Body. There are 2 wires coming out of the top of the tank. How do I hook the wires up so the gas guage works? Is one a ground and the other connects somehow to the guage in the inst. cluster? Any help would be appreciated.
Thanks
Wrecker
Thanks
Wrecker
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From: Virginia
One should be a ground. Look carefully. Does one of the wires hook to a stud with a plastic washer, and the other bolts directly to the metal? Run the ground to a good spot on the cab sheetmetal.
Your other wire hooks to the guage. I am assuming your truck at one time had a factory tank in the rear? If so, the original sending unit wire is probably floating around under there along the frame rail. I don't know the color of the wire, but maybe someone else has a diagram, and can write in with the color you should be looking for.
When you find the wire, if you want to test that the guage works before you hook it to the tank, turn the key on, and make sure the wire is not touching anything. The guage should peg in one direction. Then take the wire and ground it to a good ground. The guage should swing the other way full scale. This will verify you have the right wire, and the guage is working.
Ok, this diagram says the wire is orange. Verify this though, I have seen mistakes on these diagrams.
http://www.cybrrpartspro.com/Chilton.../85766101L.gif
Your other wire hooks to the guage. I am assuming your truck at one time had a factory tank in the rear? If so, the original sending unit wire is probably floating around under there along the frame rail. I don't know the color of the wire, but maybe someone else has a diagram, and can write in with the color you should be looking for.
When you find the wire, if you want to test that the guage works before you hook it to the tank, turn the key on, and make sure the wire is not touching anything. The guage should peg in one direction. Then take the wire and ground it to a good ground. The guage should swing the other way full scale. This will verify you have the right wire, and the guage is working.
Ok, this diagram says the wire is orange. Verify this though, I have seen mistakes on these diagrams.
http://www.cybrrpartspro.com/Chilton.../85766101L.gif
Last edited by Franklin2; Dec 29, 2003 at 08:34 PM.
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