7 pin trailer harness wire colors

Every trailer owner knows that a vehicle needs to be wired correctly for safe towing. A 7 pin trailer harness wire is a crucial component of this wiring system, and understanding the colors of the wires it contains is essential for successful operation.

A 7 pin trailer harness is made up of seven different colored wires, each with its own specific function. The brown wire is the power supply for the brakes and tail lights. This is usually a ten-gauge wire and is the most important of the seven. The yellow wire is the left turn signal and brake light supply, and the green wire is the right turn signal and brake supply. The red wire serves as a backup wire for multiple applications including the electric brakes, turn signals, and auxiliary power. The black wire is used for ground connections. The blue wire is the power source for the reverse lights, and the white wire is the power supply for the back up lights.

Other components that make up a 7 pin trailer harness include the two locking pins on either side. These are used to keep the wire in place and provide protection against accidental disconnects. Additionally, the harness should have a color-coded diagram, which is helpful in ensuring all wires are connected properly. Following the diagram is the best way to ensure a secure and successful wiring job.

A 7 pin trailer harness is an essential part of keeping your vehicle and trailer correctly wired for travel. Understanding each of the wires’ colors and functions is key for proper installation. It’s always better to be safe than sorry, so take the extra step to familiarize yourself with the 7 pin trailer harness before connecting it to your vehicle.

International Standard Trailer Wiring Kea Trailers