[77newell]

Forest: did you check the ground wire at the sender. On the 93 coach the sender has two wires; one for the signal to the dash gauge and one that goes to ground on the chassis steel. It could be just the ground wire isn't passing current. Bypassing it temporarily to see if the gauge changes may save you the hassle of pulling the sender. I would also check the wiring between the sender and gauge by grounding the signal wire at the sender. All these tests will help verify whether it's the sender.