Electric fuel pump

I own a 2004 Pontiac Sunfire. My issue is crank no start no power to the fuel pump. I started with the fuel pump relay switch. I established the control side of the circuit was good and that the supply power back to pump was good. A new fuel pump was installed pervious to this no start issue. So I wanted to directly check the pump itself. So on the bottom side of the car I disconnected the fuel pump wiring connector from the underside. I wired two jumper wires directly from a good 12volt battery neg and pos posts. I then wired neg to black ground terminal and pos to the gray power terminal on the connector going straight to fuel pump. The fuel pump came on. I tested the power to fuse on inside driver panel, FP/inj, it was good. Now on the under side the I did get a reading for ground integrity, but nothing on power?Under back seat I used a paper clip to check power nothing? Where is the problem