I have no working fuel gauge and my pump will sometimes not work until I jar it. It will then work for like 3 weeks before having a peoblemI have replaced the pump before and it didn't fix the problem. I was going to drop the tank and tAke a look at the sending unit for ground problem as per advice here, but before I do so I decided to check the wiring in the loom from the pump to. Where it meets the harness by the TC. I found one wire insulation is cut and another was twisted badly and kinda crimped. My problem is which is which? Here is a pic.