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

I have now repaired and reinstalled my wiring harness. The fuel gauge is working, at least as best as it can with an aftermarket sender. The temp gauge circuit pin was loose, so I wired that connection straight to the gauge and now my temp gauge is working as well.

The moral of the story is get a factory service manual, trace the circuit, inspect all connections and repair where necessary.

Thanks everyone!