How To Wire Up Trailer Brakes

If you are lucky and have the factory tow package already installed you may already have this wire running from under the dash to the rear of the vehicle.

How to wire up trailer brakes. Some trailer builders just connect this wire to the frame then connect the ground from all the other lights and accessories to the frame as well. Trailer brakes and wiring installation review and installation instructions. This is just a standard 4 way connector with a ground parking and signal or brake lights. The trailer brake control and additional plug in wiring harness.

Hooking up the brake controller was pretty straightforward with the standard wiring harness that comes with the controller. At the front plug. I believe there is about 25ft of wiring which should be plenty for a trailer of this size. Run a the two conductor wire to each brake and hook to the two wires on the brake.

Typically the 5 way flat is used for trailers with surge brakes or hydraulic brakes. The brake controller wasn t there but the wiring from the brake switch to the trailer plug was already in place. The trailer wiring diagram shows this wire going to all the lights and brakes. Wiring to these lights and brakes can become cracked and brittle and need replacement.

Many also have electric brakes. Also it must connect with things if included that use the aux power and back up lights too. This brake controller wiring diagram shows which wire goes where. Installing new trailer brakes on a tanden axle trailer when wiring my understanding is that the existing 7 pole wiring can be tapped into by running a two wire 12 guage section from brake to brake and then splicing into the existing 7 ptong and attaching the blue and whiteground wires do i have to ground the white wire to the trailer.

I often will run a wire along the axle tube and secure with zip straps. Today we are going to show you how to install brakes on a trailer that do. Photo by adam wright 2010. Parts are available online or at local trailer supply stores to install or upgrade the wiring on your trailer allowing you to do it yourself.

Here is the brand new generic wiring harness. Trailer feed blue wire is the wire that allows power for the controller to the 6 way or 7 way trailer connector at the back of the vehicle. Small trailers must be equipped with lights. At this point you have your wire set across the axle the way you want it so lets go ahead and pull the slack up toward the front of the trailer.