The gauge, wiring or sending unit is bad.
no
Could be a blown fuse.
The floater inside your pump is sticking. You will have to replace your fuel pump in order to fix this problem.
Your fuel sending unit is not giving the correct reading to your gauge
fuel gauge stays on full and the tempreture does not move from cold on ford explorer 1998
1984, Corvette the fuel gauge stays at 1/2 full all the time. Plaese help.
Gas gauges work based on electrical resistance. When the float in the tank is moved up or down by the fuel level, it changes the resistance and the gauge reads differently. Some gauges read full if resistance is high and full is resistance is low. If I understood the question, you unhooked the gauge and it is reading full, that is because you have opened the electrical contacts to unlimited resistance. But, if the gauge was always reading full, before you disconnected it, and that was the root of your problem, then the wire could be shorted to chassis ground and the gauge is reading the resistance of the entire truck.
Check the fuel gauge sending unit, located in the fuel tank. The sending unit could be stuck in the full position.
bad fuel pump it could also mean that the fule ammount sencor is out.good luck.
the sending unit may be stuck
fuel gauge on my 99 buick centry custom stays at full , then drops to empty. Is there a fuse or relay that i can have my neighbor look at it