All the wires have to be ran. I was able to tap into brake light wire and power source for non existent tire inflator.
The controller is on the driver side rear seat.
Yea it seems no one knows yet all the wiring is missing.
I had to run all the wires myself and pay for wiring diagram. I still need to wire a diode as the truck doesn’t like power being applied to brake light circuit without brakes being applied.
Update: after hours of looking at wiring diagrams and pulling panels off to see what my truck doesn’t have. Finally found that this pin is completely missing from my truck
Downloaded wiring diagrams. Still can’t find the connection that would go to trailer brake control ecu. I’m guessing the wire harness is completely different.
I have looked everywhere. REDARC has no idea too. Told me to basically run the wires diy. I have tracked the 7pin wires all the way to fuse box under the hood.