66 Dart gas Gauge

Tolman mike, in post #9 you will see I have already done that with nothing happening. I know I have a solid wire from tank unit to kick panel connection so I'm going to have to go inside up under dash. That's a weekend job after I get the car off the lift. I'm looking for where to go and how to trouble shoot from here. The tank and sending unit are new back when I bought it 6+ years ago and to be honest since I never drove the car I cant tell you if it worked ever since i had it. Its probably going to be back side of dash wiring or limiter but I just need to find easiest way to troubleshoot it.i haven't looked there at all. Hell I might not even have wires hooked up oan gauge! I'll find that out this weekend.
Rod