Fuel pump

Truck quit while I was driving down the road.
I turn the ignition key on the fuel pump has 12 volts and runs for one or two seconds, then quits running. At this point there is 6.32 volts at pump. I assumed fuel pump since there was no pressure at port on fuel rail. I have bed off so pump is accessible. I pulled pump off to go get another and decided to test straight of battery and it ran in my hand. Then started checking voltages. I plugged pump back up and left sitting on frame. Pulled relay and inserted a jumper and pump runs continuously. Is there a fuel pressure sensor that would tell PCM to shut down the pump after a couple of seconds?