Discussion Starter · #1 ·
Installed new gauges with new dash & wire looms a couple years ago. Everything works except fuel gauge. Decided to get fuel gauge working. Tested black wire at sending unit for ground that was screwed in to bottom of trunk floor pan. The pan is not grounded. I then looked for a ground on the rear frame. No ground found. I did grind off paint before testing. I did manually supply ground to the black wire to the sending unit and gas gauge did move just under a full tank which I believe is correct. In the engine bay I have ground on fire wall, engine, fenders, radiator support, and frame. Do I need to run under the car a ground wire off the battery back to rear to obtain a ground?