I ran wires back to the area near the rear tow socket and connected there. No diodes used.
Are you going to use a braking system? If I had it to do over again and knew about them I would opt for the ready brute. The braking system on the H3 is hydroboost and can be activated by adding an inline fuse. The brakes on the H3 are outstanding.
Heck, if you bought it used from Sacramento it might be mine and already set up.
Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate