So my fuel pump died, i managed to get the square 4 pin connector and tested the voltage...12v. So i figured it was the pump, i just replaced it with a new one and verified its getting 12v and my fuel gauge even works now. But the pump still doesn't run. I know the relay is good, and that the pump is getting juice...whats the problem?

 

Two things are needed for an electrical device to operate. Both power and ground. Have you checked the ground?