Edited: another fuel/temp gauge thread, but turns out the harness is melted together

New sender is pretty easy & cheap. See if you can get a Mopar one. Measure it before you put it in. I have had them bad out of the box, and also fail the first time they warm up, or maybe they were damaged installing. Seems like I have bought a bunch of them. They seem to be pretty crappy quality, like most Chinese stuff.