73 duster - gas gauge not working

I cleaned the original grounding strap and the gas lines to where I could see nice shinny metal, the gas hand never moved.

I tried grounding it to other places under the car with new clean wire and still nothing.

I had a mechanic try to ground it also and never got the hand to move.

I also unplugged and looked at the electrical plug on the sending unit. The threaded part coming out of the unit is clean but the rubber cap appears a little black on the inside.

Since the hand never moved, has this turned into an electrical issue or will a new sending unit still cure the problem? :banghead:

YOU NEED TO unhook the sender wire. Stick a screw, clip lead, etc in there and ground it. Then go turn the key to "run" for a short time and watch the fuel gauge