How To Hook Up 4 Wire Trailer Lights

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.

How to hook up 4 wire trailer lights. Though trailer lighting systems are available in an array of configurations the most popular is the 4 way system. The 2 added pins are for auxiliary power and back up lights. For this truck all you need is a harness with the appropriate uscar connector on one end and a 4 flat connector to mate with your trailer on the other end. Let s see what types of connectors the trailer light wiring industry uses today.

If your trailer is significantly heavy and is at the upper limits of the towing capacity of the vehicle. Learn step by step how to wire trailer lights in no time with this tutorial. The black sometimes red 12v and blue electric brakes wire may need to be reversed to suit the trailer. We ll walk you through the wiring process it s easier than you think.

A trailer with a 5 wire harness has connections for marker brake and signal lights as well as an electric braking system. By reducing a 5 wire to a 4 wire you eliminate the connection for the trailer s brakes. While the basic configuration is a 4 way flat connector that features one female and three male ends you may come across connectors with up to seven pins for additional functions that require wiring including electrically actuated brakes power source for a winch etc. Most of us aren t electricians but that doesn t mean wiring a trailer or replacing corroded wiring is beyond us.

This tow ready trailer wire harness has an uscar connection on one end and a 4 flat trailer connector on the other. The 4 way system is designed so the right brake light wire and right turn signal are green. Round 1 1 4 diameter metal connector allows 1 or 2 additional wiring and lighting functions such as back up lights auxiliary 12v power or electric brakes. Wiring trailer lights can be a big task and you want to get it right.

Wiring instructions for optronics 4 1 2 inch round trailer stop turn and tail light st40rb installing a brake controller on a 2002 dodge ram 1500 equipped with a factory 4 way can trailer 4 way be ran to trailer with 8 wires for trailer wiring. It doesn t get any simpler than this. 6 pin connectors also exist but they are less common 1 4 wire the first 4 pins just like above and the 5th line goes to the brakes.