in order to replace the sender or even reconnect the wire to it, you'll have to drop the tank or cut an access hole in the floor - you can rebuild yours using parts from a repro pickup sender, or PM bartamos, who I think has some rebuilt
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics