sounds backwards, the center terminal on the sender is the sender wire, one to the "side" [mounting screws] would be an added ground in case the tank isn't providing a good ground

Bill


Moved over to the Passing Lane

"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