SOLVED: Fuel system diagram 2003 ford f150 - Fixya SOURCE: I need diagram for evap system for 2003 Ford You DO NOT necessarily need special testing and tools to fix this. Many auto parts stores have scan tools that they'll hook up for free as a diagnostic aide. fuel pump wiring diagram - Ford F150 Forum Does anybody by chance have a wiring diagram for the plug going to the fuel pump? I'm not getting fuel pressure and can't hear the pump run, however I just replaced it last fall. I would like to make sure it's the actual pump before replacing it again, I'm worried that perhaps it is the non-serviceable relay 303 or some other component. No power to fuel pump. Need wire diagram - Ford Truck 1987 - 1996 F150 & Larger F-Series Trucks - No power to fuel pump. Need wire diagram - The fuse is good as long as im looking at the right one, and the fuel shut off switch apears to be working. No power at the fuel pump though. I just bought this truck and the previous owner manualy wired the fuel pump through a.. 2003 Ford F150 Fuel Pump Wiring Diagram | Diagram 2003 Ford F150 Fuel Pump Wiring Diagram. Posted on December 31, 2014 by admin. 86 ford f 150 fuel pump relay wiring diagram images gallery 2003 ford van fuse diagram wiring diagrams schematics rh o d l co graphic 1999 ford f150 fuel pump wiring diagram beautiful 2003 5 4 expadtion no pressure. Ford F-150 Questions - Fuel pump relay - CarGurus The two top wires in diagram are voltage and both fuse protected. The voltage comes from pcm and guides one on how to jump directly to the pump --- I need a schematic that shows the whole fuel pump wiring system for a 2002 so I can see what else might be in the system --- For safety 2002 ford f150 fuel pump electrical schematic. 22 Where Is the Fuel Pump Relay on a 2003 F-150? | It Still Runs Ford uses a fuel pump relay to control the fuel pump assembly in its 2003 F-150 series trucks. The relay receives low amperage battery voltage through the powertrain control module, which energizes the primary windings in the fuel pump relay and closes the normally open circuit in the relay.