My electric brake controller has 4 wires - red, white, blue and black. The harness that came with my Tundra has two large wires: black-red, and red. It has three smaller wires: Green, green-white, and brown. How do these 4 controller wires attach to these 5 Tundra harness wires?
Tundra harness description: Black-red: Fused trailer brake controller battery feed. Red: Trailer electric brake feed from brake controller (output) Green: Headlamp switch to vehicle trail lamps Green-white: Vehicle stop lamp switch to brake controller (Input) Brown: Trailer ground