fuel level gauge & sending unit help

[pegleggreg]

I have a problem. I keep running out of gas. I have a fuel cell with a fuel level sending unit. But the prior owner had a wire from the fuse block to the sending unit & no ground wire to the sending unit at all. While i was chasing the wire from the sending unit to the fuse block i noticed a couple cuts in my carpet on the floor board. Also some melted wire, so obviously there was a problem. I am no electrician, but to me, it is not safe to run a hot wire to the gas tank. So i disconnected the wire. Does anybody know the correct way to wire up the fuel level gauge to the sending unit? It reads resistance i think.