What Color Wires Go Where On A Trailer

By | August 5, 2015



When it comes to hitting the open road, nothing is quite as exciting as taking your trailer off-roading. Whether you’re planning on heading off on a cross-country adventure or just a weekend getaway, one thing is for certain: you’ll need to make sure that all of the various wires and cables leading from the trailer to the vehicle are properly connected. Knowing what color wires go where on a trailer helps make this job much easier.

The first step towards achieving a safe connection between the trailer and the towing vehicle is to inspect the wiring harness. The harness should have four wires: two of which are for the brakes, one for the ground connection, and one for the running lights. The wire for the brakes is usually brown, and the wire for the running lights is typically yellow. These two should be connected straight to the corresponding terminals in the towing vehicle. The ground wire is usually white and should be connected directly to the metal frame of the trailer, while the final wire, which is black, is for the reverse lights.

To make sure that you get the best performance out of your trailer lights, it’s important to also inspect the trailer plug for any damage or corrosion. The trailer plug should have three connections—one for the running lights, one for the brakes, and one for the reverse lights. These will typically have different colored plastic connectors, which can help you quickly identify which wire goes where. Once all of the wires are correctly connected, simply secure everything with zip ties and tape, and you’re ready to hit the road!

In summary, if you’ve ever wondered what color wires go where on a trailer, the answer is a lot simpler than it may seem. Generally speaking, the wire for the brakes is brown, the one for the running lights is yellow, the ground is white, and the reverse is black. It’s also important to regularly check the wiring harness and trailer plug for any damage or corrosion. Following these steps will help ensure that your trailer lights are reliable and working correctly, allowing you to safely and securely tow your trailer wherever your adventures take you.


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