For the new body style F-150 the fuel pump relay is not a serviceable item, it is built into the fuse panel. The fuse is fuse 34 ( only for 04 & 05 MYs ) which is called Fuel injectors in the 04 Owners Manual. The other items 1. Fuel Inertia switch ( assume you checked this, but it was not called out ) 2. Teh Fuel Pump Driver Module ( FPDM ) on the cross member under the back of the truck. You need to drop the spare to see it. There is a TSB on this, where corrosion can build up between the aluminum FPDM case and the steel cross member, causing the module to crack.

2004 - 2008 F150 - Fuel Pump Module - I can't be the only one - So I have yet one more reason to wonder what the the egineers at Ford are thinking. As I enjoyed a cup of coffee, and came across a tech thread about a 'Fuel Pump Driver Module' located on the back side of a crossmember under the bed. Where is the Fuel Pump Driver Module located? - Trying to replace the F.P.D.M. I have the part but can not find it under the truck. Where is it loc.

Here is what mine looked like before I changed it on my 2006 The cable is the spare tire lift cable and the picture is facing the front of teh truck, the tire is the driver's side rear tire. Sep 19, 2010 .