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. The trailer wiring diagram shows this wire going to all the lights and brakes.
By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights.
How to wire a trailer with brakes. Wiring to these lights and brakes can become cracked and brittle and need replacement. This is accomplished by tapping into the tow vehicles electrical harness to transfer power to the trailer wiring system. Special light and wiring systems need to be installed on your tow vehicle before you can tow any trailer.
There are a couple of things you want to look out for before you start. If you have never done wiring on a car before you might not want to attempt this install as your first wiring project. Many also have electric 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. Also it must connect with things if included that use the aux power and back up lights too. 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. Trailer wiring and brake control wiring. You want to step behind your trailer and look behind the existing hub you have.
It is actually pretty easy to do. Installing new trailer brakes on a tanden axle trailerwhen 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 wiresdo i have to ground the white wire to the trailer. The brake controller comes with a wiring harness that is the kind you have to splice into your vehicles wiring.
Today we are going to show you how to install brakes on a trailer that does not have existing brakes. Tail light converters brake control wiring vehicles towed behind a motorhome wiring diagram for common plugs breakaway switches. It is just very time consuming.
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.