Car wiring diagrams: Ford Upfitter Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Video embedded Hey guys, this is my first video I've ever made so I apologize for getting tongue tied so much. Please email me at Sauder@gmail.Com if . Video embedded Location of the Upfitter Switch wires in the cab and engine compartment. On the a Ford Super Duty..Dors anybody know if the upfitter switches are hooked up or do you need to wire them like the gen ?.