Check resistance at the module harness connector before you pull your hair out looking for something that might be ok. Both black wires must be less than 5 ohms to ground with the connector unplugged.

 

[QUOTE=newguy;578829]Could also br the sending unit on thexpump. Mine did similar stuff also had no speedo. Put in axnew pump and everything worked again. Anyway could be the the ground on the pump wires ontop of the tank[/QUOTE