It is in the lower right hand corner of the twelve cavity connector just below the connector that I am backprobing in the picture above. The next step was to locate the light blue/orange wire in cavity #12 of the C270B connector. I checked fuse #34 with the key on and it had power and was good so that eliminated a faulty pcm relay and related wiring. This told me that the fuel pump, inertia switch and related wiring were all okay. Since my backprobe wire is part of a fused jumper wire, I connected battery voltage to the circuit and started the vehicle.
I placed a jumper wire into the cavity to backprobe the circuit, no volts. The wiring diagrams stated that the fuel pump relay output wire was dark green/yellow and it was located in cavity 3 of connector C270K. My next test would involve locating the output circuit from the relay. I did some reading and found that there are five internal, non serviceable relays inside the fuse block.
2005 expedition fuel pump fuse manual#
Since my wiring diagrams stated the relay was located in the fuse box, but did not give a specific position, I looked in the owners manual for more info. There is a black plastic cover that has to be pulled off of the actual fuse box. Pull the edge loose at the firewall end and pivot the cover back.
There are a couple of covers that have to be removed. I decided to go to the interior fuse box, where my wiring diagrams, stated the fuel pump relay and fuse are located.
2005 expedition fuel pump fuse code#
A quick check found no fuel pressure and a code P0231 (low voltage on fuel pump monitor circuit). This 2003 Ford Expedition came in with a no run condition.
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