Fuel Pump problem on 1996 Ford Aerostar

Got new complete sending unit and both lines are hot, but when I plug it in to fuel pump its not receiving juice to the pump. Had the fuel pump checked and its good so what could be the problem? When I unplug the ground wire and put a test light to it its hot, but when I plug it back into place its not hot on either side coming to it. Can somebody please help me resolve this issue?

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1 answer
I'm looking at the wiring diagram at it shows 4 wires to the sending unit, and a solid black wire for the ground, is that where you are getting 12 volts? And the ground wire is not connected? And you have 12 volts to the pink/black wire only when trying to start the car?