The blue wire carries the controllers output to the vehicles trailer connector. Without wiring the controller plug in the harness.

Proportional Electric Brake Controller Company Hayes Towing
Kelsey trailer brake controller wiring diagram. Hook up a trailer to the tow vehicle and connect the round seven pin hitch. The white wire is ground. Refer to the wiring diagram in figure 4. Brake controller wire functions by wire color question i have a kelsey energizer brake controller the wires aint mark what goes to what i have a blue one a black one a red one and a white one the colors are the same for my harness that plugs in under my dash asked by frank 0 expert reply the wires exiting the rear of your controller serve. The black wire connects to the battery positive terminal through a circuit breaker to deliver operating power to the controller. Installing a kelsey energize brake controller in your vehicle will provide power for your trailers electric brakes.
To be safe i would suggest using a circuit tester such as part 40376 to verify the connections. Curt trailer brake controller wiring diagram control in wiring. 2008 dodge ram 1500 trailer brake wiring diagram fresh dodge wiring. For vehicles without a trailer towing package. And the red wire connects to the cold side of the brake. If the wiring adapter you have is an aftermarket harness it should wire up color for color.
Electric trailer brake wiring schematic collections of electric trailer jack wiring diagram download. The four wires on trailer brake controllers are standardized so they always connect in the same way. The kelsey trailer brake controller works only in 12 volt vehicles and on single and twin axle trailers. Brake controller wire functions by wire color etrailer. It cannot operate more than four electric brakes. To the right i have attached a picture of a diagram of how brake controllers wire to tow vehicles.
Too much braking and the trailer. Wiring diagram for stock trailer refrence lovely trailer wiring. I have a kelsey energizer brake controller the wires aint mark what goes to what i have a blue one to the right i have attached a picture of a diagram of how brake controllers wire to tow vehicles. The brake controller monitors the vehicles brake pedal and deceleration rate and calculates the correct amount of braking power to deliver at the trailer. Start the tow vehicle engine and confirm that the red control module indicator light on the front right.