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No start...no power to fuel pump

2004 - 2008 F-150

No start...no power to fuel pump

 
  #1  
Old 05-06-2019, 08:05 PM
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Join Date: May 2019
Posts: 3
No start...no power to fuel pump

So my truck, 2008 F-150 FX4 died on me the other day. Here is what Iíve done so far.

- Traced out each wire from FPDM and checked for continuity, all good.
- replaced FPDM with a used ford part and a new Dorman part 590-001
- checked inertia switch, which was in the correct position.
- checked fuel rail sensor and checked wires for continuity. Good there too
-fuel pump will cycle and truck will run with power direct to fuel pump, bypassing the FPDM.
- tried plugging in another fuel pump while FPDM was in the loop just to see if it was a voltage issue from the installed pump. But nothing.
Any advice??
 

Last edited by Smokeater99; 05-07-2019 at 10:50 AM.
  #2  
Old 05-06-2019, 08:36 PM
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Join Date: Jan 2007
Location: Vernon, NY
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What are you working on? We can't see it through the Internet........
 
  #3  
Old 05-06-2019, 09:00 PM
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Join Date: May 2019
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Originally Posted by ManualF150 View Post
What are you working on? We can't see it through the Internet........
Sorry dumb dumb move. 2008 F-150 FX4
 
  #4  
Old 05-07-2019, 11:17 AM
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Join Date: May 2005
Location: Broken Arrow, OK
Posts: 2,119
Try a new FPDM from Ford, not Dorman. You could just have a bad unit.
 
  #5  
Old 05-07-2019, 11:55 AM
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Originally Posted by SoonerTruck View Post
Try a new FPDM from Ford, not Dorman. You could just have a bad unit.

Are the doorman modules really that bad?
 
  #6  
Old 05-10-2019, 07:42 AM
Junior Member
Join Date: Sep 2014
Posts: 4
Sounds like there's a loose or corroded wire in a CONNECTER somewhere. You stick the probe of your meter in there, it picks it up as good, but it's loose enough that plug it into the other end of the connector, it's more loose.
Or, a simple continuity test would show a good wire, even if only 1 of the required 12 volts were actually making it through the wire, and probably fool to CAN system too. (assuming 12 volts are actually what the pump needs)
 
 


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