I've got a new tank and sending unit I put in my 64 I'm working on. I've also just installed a new Rebel Wire wiring harness. I can't get the fuel gauge to work. The gauge is probably the original one and I have no idea if it's good or not. I clipped the sending wire terminal off the old wiring harness and soldered it to the new sending wire. I clamped a wire to the sending unit nipple and grounded it to the body but it still doesn't work. I have a good wire with two alligator clips and I clipped one to the locking ring and clipped it to the same terminal I have the other wire attached to the body. Gauge still doesn't move. I have a new low voltage regulator and it's working because I checked it with a test meter. I'm thinking the next thing is to buy a new gauge since nothing else is working.