4 Wire Trailer Wiring Instructions

By | July 26, 2022



Tow vehicles and trailers are complex machines, and having the right wiring connections between them is essential. If you have a trailer with four wires, you need to follow specific instructions for 4 Wire Trailer Wiring. Following these instructions will ensure that you avoid dangerous and costly mistakes.

When it comes to making the proper connection for a 4 Wire Trailer Wiring setup, there are several steps you must take. First, install a four-way connector on the rear of your vehicle. This connector will attach to the rear lighting and electrical system of your car. It should also include a 12-volt Auxiliary Power Circuit. Next, you will want to connect the four-way to the actual trailer itself. Make sure to check the markings on the trailer to confirm the correct polarity. Finally, double-check all the wires you attached, ensuring they are firmly secured to each of the plugs.

Once you have your four-way connection completed, test it out! Have someone stand at the back of the trailer and use a tester light to make sure there are no broken connections. Your tester light should show four colors: yellow, green, brown, and white. If all four colors appear, then you know you have a secure connection.

By following these 4 Wire Trailer Wiring Instructions closely, you can be confident that you have done a quality job and your trailer will receive the power it needs safely and securely.


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