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1. 2003 FORD EXPEDITION FUEL PUMP LOCATION MANUAL
2. 2003 FORD EXPEDITION FUEL PUMP LOCATION FULL
3. 2003 FORD EXPEDITION FUEL PUMP LOCATION CODE

If the noise is from the fuel pump, failure of the pump is often imminent and you should replace the fuel pump at your earliest convenience. As a fuel pump fails, you may notice a whirring or humming noise coming from the fuel tank area, toward the rear of the car. The lack of fuel may result in the engine operating without enough fuel relative to the amount of air, causing the check engine light to appear. Sometimes a fuel pump will fail slowly, and that means the fuel pressure and volume slowly degrades. A failed fuel pump may prevent a car from starting or stall it.

2003 FORD EXPEDITION FUEL PUMP LOCATION FULL

This repair will generally apply to Ford and Lincoln full sized trucks and suv’s in the same years//body style. I put all of the covers back on, cleared the codes and test drove the vehicle. The cover for the battery stud on the fuse block. This is the end of the battery cable that I referred to earlier. I plugged everything back in and bolted the fuse block in place. The old fuse block on the left and the new one on the right.

I feel fairly confident that if this problem would have been caught soon enough, the solder joint could have been repaired or a new relay installed (if one could have been located). The fuel pump is located in the fuel tank here is a guide that will give you an idea of what you are in for when changing the pump out and diagrams below of what it will be for your car. The damage was even easier to see from the relay side of the board. Once I had it opened it was easy to see the damage. I took the back cover off of the fuse block and started disassembling it. I carefully removed all fuses and relays from the fuse block and laid them out in the order removed. You can see the battery terminal post on the lower left edge. I have my finger in the pull handle for it. There are connectors on the top where testing was done and on the edge. There is only one bolt that holds this fuse block in place. I have pictures of that at the end of this post. There is a battery feed cable that also has to be disconnected on the rear edge of the fuse box. With all of this testing I knew without a doubt that the fuel pump relay that is part of the interior fuse box was faulty.ĭisconnect the battery first before removing the fuse block. clogged fuel filter, fuel pump malfunction, faulty oxygen sensor. This told me that the pcm was using a ground to energize the fuel pump relay coil. 2006 ford expedition Limited heater fan runs on high all the time when we switch from. When the ignition is turned on the reading was near zero volts and after a few seconds it went to battery voltage. clock spring and check Fuel pump inertia switch and reset button location.

2003 FORD EXPEDITION FUEL PUMP LOCATION CODE

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. This Ford Escape delivers a Intercooled Turbo Premium Unleaded I-3 1 Code for. 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.

2003 FORD EXPEDITION FUEL PUMP LOCATION 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. 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.