fuel gauge problem

[mainermikeyd]

ok guys you helped me perfectly with my last question, got another one for ya. My new toy is a 85 K20 4x4 with a 82 Sierra cab, (Northern Maine winters), my problem is the chasis had dual tanks, cab had single, fuel gauge is pegged past full, I have checked, an installed a new ground from fuel tank. Going to install a new tank eventually (drivers side is one missing), where do I start my diagnosis from here?? Any help, or suggestions will be greatly appreciated thanks

[old Rusty C10]

usually when the tank is pegged like that i fool with the brown wire on the tank and it gets back to normal..my truck is a left hand tank tho

[mainermikeyd]

ok guys here is what i have done so far, dropped the tank last nite, all the wiring had been butchered not once, twice, possibly 3 or 4 times butt connectors everywhere!!! Everything from the cab forward is all new wiring, including ground wire from tank, still no change with the fuel gauge is there a way to test just the gauge???? Is there anything specific to check as far as the instrument cluster, i.e. bad connection, no connection??

[Albatrossian]

When the needle is pegged.. more than likely it's a ground problem.. check your other grounds too.. engine, frame, even the ground from the tails to the frame.. shorts are a pain in the neck, I tell ya!