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Under hood power distribution box

3K views 8 replies 6 participants last post by  countryboyrob 
#1 ·
My dist box has a fuel pump relay and 20 amp fuse from the factory. Looks like it is wired for E-fuel . Does anyone know where the wires come out under the truck? TIA
 
#2 ·
What year is your truck?

None of the OBS trucks were factory wired for e-fuel AFAIK. What fuse number is this?
 
#4 ·
Relay #2 is for the fuel pump on gassers, but is the IDM relay on our diesels.

Fuse #16 would be the fuel pump fuse for gassers but is not used in our trucks AFAIK. Maybe somebody stuck a fuse in there when something else failed, thinking that would solve something. But I don't think there are even any contacts in that position on our power distribution boxes.
 
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