fuel gauge

DARTLARRY said

I am working on an old chrysler. And the fuel gauge reads full all the time, as if it were grounded. I have checked all the wiring, and it seems fine. what else could I be missing? The gauge obiviously works. and the other gauges work also. except the gas gauge. The car is a 1960 model if that helps.

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You need to verify the wiring from the sending unit to the gauge is actually good with a multi meter - make sure there's no excessive voltage drop or unwanted resistance that would cause an inaccurate reading. Check it at various points to find the problem. Just cause it 'looks' OK does not mean it is.

Also, if it's doable, you might need to look into checking the ohm sweep on your sending unit. There's an arm on the unit that's attached to a float in the tank. It creates a certain amount of resistance when the fuel is at a specified level. If the wiring checks out OK, I'd look there.