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Check fuse 27 in the engine bay fuse box. It is the fuel pump fuse and there is a known problem with it shorting out and melting. Below is a TSB for Ford technicians to fix the problem.
Check fuse 27 in the engine bay fuse box. It is for the fuel pump. Click on the link for the TSB.
Does the fuse look burnt or melted?Look in the socket where the fuse inserts and make sure the wires are not melted.
In the engine bay fuse box and remove the fuel pump relay. Then check for power on pin #3 of the relay socket when the key is turned on. See the diagram below.
That pin gets power from fuse #27. Follow the TSB I posted to repair the problem. The fuse is getting power but is not sending the power to the relay. The TSB is placing a larger relay and larger wiring pins to handle the current load of the fuel pump.
You are getting power on pin #3 of the fuel pump relay with it removed and the key turned on?
Next I will need you to go to the FPDM (fuel pump driver module) located on the frame rail above the spare tire on the drivers side and check for power on the VIOLET/LIGHT GREEN wire at the FPDM with the relay installed and the FPDM unplugged. It should be pin #1 in the diagram below.