[TBONE1964]

Originally Posted by jjzepplin

The tank is indeed full.
The ground clip removed does not change the gauge reading.
Maybe pull the big cluster plug and jiggle around?
I am going to try the jumper wire at the tank.
Is that what you mean?
I tried the ground clip to a known ground and nothing.

Are you talking about the ground clip near the cluster? It is always good to have it hooked up but I don't think it is related to your problem.

Yes, the jumper ground at the tank but like I said, If you have a bad ground there, that will make the gauge read past full.

It sounds like you have confirmed the sender is good and the test worked.

Do you have another loose fuel gauge with the resistor on it? If you do, try to give it 12v and a ground and unplug the tan wire from the fuse panel and hook it directly to your other gauge and see what that gauge does. This is going to tell you if the gauge resistor is keeping the gauge from reading past 1/4 tank. Let me know if you need help figuring out where to hook the jumpers on the back of the gauge.

I know this is a PITA but think you have/had multiple problems with your fuel gauge not reading correctly.