go to the back of the jeep on the driver side, inside the frame at the top of the tank you will see the sender/pump harness. disconnect that. the center wire (gray or brown) is the one you will need to check. put an ohm meter on that wire and on a clean ground. your factory resistance is 0 ohms empty 88 ohms full. also check to make sure the ground to the tank is good.
"We'll get out of this disaster in time for the next one"
"I'm done recomboobulating the energy-mo-tron"
88 YJ, 350/350 Chevy, Twin Stick Dana 300 with JB 32 spline rear output, 6.5" lift, Front Scout II Dana 44 w/Yukon 4340 shafts, trac loc, 4.27's, Warn Premium Hubs, flipped YJ Tie Rod, Ford F150 front calipers, Rear Scout II Dana 44 w/Alloy 4340 shafts, HD RPT retainer plates, 4.27's True trac, Steeltech Disc brakes, Cage upgrade, B&M Prostick Shifter, Custom Fabbed tire, gas, jack carrier, 3/8 angle rear bumper, clevis's all around, old & reliable rep8000 winch. Flood lights. loud stereo. 35x12.50 swampers and a bunch of other stuff