When ordering i was worried that the length of the wire would be short but i was very pleasantly surprised to find the length to be way more than i needed for my 12 foot trailer. 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.

Led Trailer Light Kit Under Over 80 Waterproof 2 Tail
Wiring a utility trailer lights. So here i have an older trailer which needed some work along with re wiring the lights. The 4 way system is designed so the right brake light wire and right turn signal are green. This is a fairly simple setup no license plate light or. How to wire trailer lights. The trailer wiring diagram shows this wire going to all the lights and brakes. Though trailer lighting systems are available in an array of configurations the most popular is the 4 way system.
Keep your trailer light wiring in tiptop condition. Also it must connect with things if included that use the aux power and back up lights too. 4 way trailer connectors are. It is referred to as such as the system needs a mere four wires for the trailer tail lights turn signals and brake lights to illuminate. This is a fairly simple setup no license plate light or clearance lights. Video tutorial on how to wire trailer lights.
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. The four wires control the turn signals brake lights and taillights or running lights. As the name implies they use four wires to carry out the vital lighting functions. 4 way trailer connectors are typically used on small trailers such as boat snowmobile utility and other trailers that that do not use brakes. Lights appear to be excellent quality. They also provide a wire for a ground connection.
Be sure to check with your local law. Properly functioning trailer lights are a must for safety so check your lights every time you use your trailer. So here i have an older trailer which needed some work along with re wiring the lights. Use on a small motorcycle trailer snowmobile trailer or utility trailer. If your utility trailer is starting to show its age you no doubt have had problems with your lights. Can also be used as custom wiring on trailers with 3 lightwire systems.
This package contained all i needed to replace all the lighting and wiring on my utility trailer. 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. See tow vehicle taillight wiring below. The red and blue wire can be used for brake control or auxiliary. Video tutorial on how to wire trailer lights.