Disconnect harness at tank.....attach a test light, not a voltmeter, to the fuel pump circuit on the half of the connector going away from the tank, not the one to the tank....now turn the key to on....test light should come on for 2 seconds and then go out.....now crank vehicle....the light should be on for as long as you crank.....
If the test light test is ok, and you have no fuel pressure at the rail, with the tank connected, you need a fuel pump.....
If the test light does not light, it is not the pump.....