Fuel Gauge showing full all the time
hi, I have an 02 tiffan allegra 38' bus on a freightliner chassis, i'm having a hard time fixing my fuel gauge, it hasn't worked since I bought the rv 2 1/2 years ago, everything else works on the dash, the fuel gauge is reading full all the time, I dropped the tank and replaced the sending unit and also replaced the gauge on the dash, the gauge still reads full, it has to be a wiring issue, so tonight I called freightliner to get a wiring diagram and they couldn't find one for the fuel system but told me it sounds like a grounding issue. I called tiffan a couple days ago and they told me to call freightliner, I'm going to try tiffan again tomorrow. I need to check the chassis ground but i'm not sure where to look
Allegro bus 38'