Four Prong Trailer Light Wiring Diagram

Some of the lights were out but the light bulbs were fine.

Four prong trailer light wiring diagram. Installing 4 pin trailer wiring. Many trailers have three circuits. Start by cutting the white wire and attaching it to the trailer frame. Brown tail lights side markers and running lights see brown wire notes below 3.

Trailer electrical connectors come in a variety of shapes and sizes. 4 pin connectors are the standard used for most trailers. The circuits are for left and right brake lights and running lights. Yellow left turn signal left brake light 4.

The rest you can ignore. 3 4 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white. 5 way trailer wiring diagram allows basic hookup of the trailer and allows using 3 main lighting functions and 1 extra function that depends on the vehicle. Let s see what types of connectors the trailer light wiring industry uses today.

Can also be used as custom wiring on trailers with 3 light wire systems. 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. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector. Please see the trailer wiring diagram and connector application chart below.

Three wires are for the trailer while the last wire is the ground wire. Installing the 4 pin trailer wires. The original wiring on my boat trailer was damaged and installed incorrectly by the previous owner. By law trailer lighting must be connected into the tow vehicle s wiring system to provide trailer running lights turn signals and brake lights.

Custom wiring is the ideal solution for installing trailer light wiring on your vehicle. The 4 pin connector only has the first 4 items listed. Use this 4 pin trailer wiring diagram to properly wire your 4 wire trailer plug. 4 pin trailer light wiring diagram.

An extra pin allows using another extra function. The red and blue wire can be used for brake control or auxiliary. A custom wiring harness or t connector is a vehicle specific harness that plugs in without any spicing required and provides a standard connector output. 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.

5 wire trailer wiring diagram. Use on a small motorcycle trailer snowmobile trailer or utility trailer.