I have a 2005 F350 with the factory installed toggle switches and brake controler. Does anyone know where the wires from the four switches go to hook up auxiliary equipment??!! I would think there would be relays under the hood the run to that I could plug leads into. I want to hard wire a fuel tank in the box and also a snow plow but cant track where the wires end up. Any help would be great, Thanks!!

 

There's 4 blunt cut wiresbehind the CJB fuse panel.. (Central Junction Box) tapped to the wire harness.. Go to this site,,, https://www.fleet.ford.com/truckbbas/topics/qvmp.html

Bulletin Q-117 for the PDF instruction for upfitter control