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Aux.relay box #4 2005 F150 location - 1998 Ford Expedition

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6ya6ya
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Posted on Jan 02, 2017

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sscullys
  • 984 Answers

SOURCE: can anyone tell me the location of the fuel pump

The Fuel pump relay is a non serviceable relay ( built into the fuse panel ) in the 04-08 MY F-150s.

Did you check the Fuel Inertia switch ( in the passenger side kick panel by the fuse panel ) ?

If you are having a no fuel pressure issue, might want to take a look at the FPDM ( Fuel Pump Driver Module ) on the cross member above the spre tire ( need to drop the spare to see if ).

There is an issue with 04-07 ( 04-06 ?? ) MY trucks where the FPDM is bolted directly to the cross member, and dissimilar metal corrosion happens and builds up behind the FPDM, causing it to break.

Here are some before and after pictures from my 2006, I replaced mine for the heck of it and found that the case had cracked with ~ 51K miles on it, soon the PCB would have cracked leaving me stranded

d416568.jpg

d3de10c.jpg

New version of the FPDM with the stand off studs
4b54e66.jpg

This is the kit I got ( check that the Part Number has not been changed )
3dc6520.jpg

Posted on Jun 28, 2010

Testimonial: "thanks for the tip i'll check it out. i've tried to reset the fuel cut-out but it's hard to tell if it resets and finding a test point to prove it is well.... daunting. i have no fuel pressure whatsoever and the fuel pump will not run although it will if i put 12v directly to the fuel pump motor so i know it's not the fuel pump."

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