4 Wire Trailer Hitch Wiring Diagram

This article shows 4 7 pin trailer wiring diagram connector and step how to wire a trailer harness with color code there are some intricacies involved in wiring a trailer.

4 wire trailer hitch wiring diagram. I have had to mess with trailer wiring for years once or twice a year anyway. Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller backup lights or a 12v power supply for a winch or interior trailer lights. If you follow our trailer wiring diagrams you will get it right. You will then be able to match them up to the 4 way harness.

In this video we go over how easy and fast it is. I have a separate wire for brake lights. Complete with a color coded trailer wiring diagram for each plug type this guide walks through various trailer wiring installation solution including custom wiring splice in wiring and replacement wiring. Above we have describes the main types of trailer wiring diagrams.

The red and blue wire can be used for brake control or auxiliary. 4 pin trailer wiring diagram. Trailer wiring diagrams trailer wiring connectors. Does your vehicle have a 4 flat trailer wiring harness but you need to tow a trailer with a 7 way harness.

Start by cutting the white wire and attaching it to the trailer frame. 1 4 wire the first 4 pins white brown yellow green just like the 4 pin connector above. I m not able to track down a wiring diagram for your chevy truck. Some trailers come with different connectors for cars and some have different wiring styles.

Attach white ground wire to vehicle frame. You must check the trailer manual to see if the wiring is correct but normally the white wire is called the ground wire while the brown wire is used for tail lights. To connect the electric system of your trailer to the vehicle you will be using special connector. If your vehicle is not equipped with a working trailer wiring harness there are a number of different solutions to provide the perfect fit for your specific vehicle.

Installing the 4 pin trailer wires. Below is the generic schematic of how the wiring goes. Blue electric brakes or hydraulic reverse disable see blue wire notes below in the trailer wiring diagram and connector application chart below use the first 5 pins and ignore the rest. Standard color code for wiring simple 4 wire trailer lighting.

Trailer light and harness installation instructions vehicle connection connect the wires of the 4 wire trunk connector to the vehicle wiring. Yellow and green are for left and right turns and braking. Can also be used as custom wiring on trailers with 3 light wire systems.