the wiring from the dash to the pump is terminated on the pump end by a plastic (molex) connector. it cannot plug in to the pump wrong. i suppose someone could have rewired the connector but that probably is not likely. i have attached pictures of the pump. i’ve considered the fact the wiring harness has a boken wire in it, but the gauge operation is solid when the pump is out of the tank. the other thought i had was the float arm was not making good contact to the sending unit on the pump when it is submerged in the gasoline.

Attachments:

1. 

   wiring-harness.jpg
   

2. 

   hisun-fuel-pump.jpg
   

it does float. i can look in the tank and see the float arm move left to right. it is a new fuel pump. this is the second fuel pump i’ve tried.