Originally Posted by ischua
Can you check the gauge and sending unit with out removing the tank? Thanks
With a test meter in the resistance scale, if you can isolate the wires to the sender, and disconnect the fuel gauge, there should be a resistance displayed - dunno what specific range your unit uses - but lack of any resistance indicates a bad sender or open leads to the tank sender - if you can add fuel, or somehow move/shake the tank to cause movement of the fuel level, the indicated resistance displayed should also change. IF all that checks out as good, then your problem is elsewhere = possibly the fuel gauge itself...
All the sender unit is, is a resistance potentiometer similar to the volume control in a radio - the "shaft" of the potentiometer is fastened to an arm with a float on the end, as the float and arm raises and lowers with changing fuel level, the potentiometer resistance changes, and operates the fuel gauge...
John Day....|'88 Winnebago Super Chief 27ft. Class A
Eastern .....|'88 KIT model 240 24 ft. 5er
Oregon ......|'02 Dodge/Cummins 2500 Quad Cab