Fuel sending unit wire

Thanks for the quick reply. I tested continuity between the fuse block and the sending unit end of the wire and it is good. Next I grounded the sending unit (it also has the ground strap on it) with a wire with alligator clips on each end. Still nothing. I will try grounding it better tomorrow (it's dark out now) and see what happens. I tried grounding the sending unit wire, still no movement on the gage.

Could I possibly have a bad ground on the cluster? Or a bad trace? My illumination lights work on the cluster but is it possible to be recieving a ground through the voltage gauge? I need to find the wire to the temp gage and ground it and see if it moves, it's probably not hooked up since the aftermarket gage cluster is hooked up.