The wiring diagram is great!
Is adding a brake controller doable for a newbie or should I try a hitch shop?
There are 4 wires that go to a brake controller... Black, White, Blue, and Red...
Black is positve battery
voltage and should be run to the battery
through a 20 amp auto resetting circuit breaker.
White is ground and should be run directly to the negative batt terminal
Blue goes to the 7 pin for the brakes
Red connects to the brake light
Hope this helps....