The tank had been relocated to under the truck bed. Eventually I'll make that original; another project another day. So I went through the wiring and fixed the backwards connections, replaced wires etc. I've got life in the gauge! However....when the sender unit float is raised to a "full level" the gauge will read close to empty. When the sender unit is all the way lowered as if it were "empty" the gauge reads 1/2 full. I cannot get it to go any higher than that so two questions lie on the table. How to get the gauge to read the full spectrum, and is there a crossed wire/backwards that would make the sender unit read that way? Thanks guys! Ps if pictures of things would help I could provide.