The wires from the upfitter switches are located just above the central junction box in the truck's interior.
Look to the left of the steering column and there will be a removable panel above the central jujnction box. Pull that and look above the box. There will be 4 wires with...
Check your primary fuel filter. If it is covered with jelly or a wax deposit then you know that you have a fuel jell problem.
Once diesel fuel has those wax crystals floating in it a filter will plug up quickly. Warming the fuel will help put that wax back into solution. An anti-gel...
Recommend writing down the truck's VIN and then visit a Ford dealer to get the OASIS report on that truck.
THis will give you the repair history and (more important) if the truck has been flagged as being modified.
Lou Braun
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