Wiring Diagram For Trailer Lights 4 Pin

The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector.

Wiring diagram for trailer lights 4 pin. The ground wire should be run from the frame of the. Trailer electrical connectors come in a variety of shapes and sizes. The second diagram shows two brake lights two indicators two side lights and a fog light. Installing the 4 pin trailer wires.

By law trailer lighting must be connected into the tow vehicle s wiring system to provide trailer running lights turn signals and brake lights. 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. The first diagram is a simple set up of two brake lights two indicators and two side lights. Traditional trailer with brakes use a 5 pin connector.

3 4 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white. Below is the generic schematic of how the wiring goes. 4 pin trailer wiring diagram. Click on the image below to enlarge it.

4 pin connectors are the standard used for most trailers. Some of the lights were out but the light bulbs were fine. Yellow and green are for left and right turns and braking. Three wires are for the trailer while the last wire is the ground wire.

The original wiring on my boat trailer was damaged and installed incorrectly by the previous owner. Start by cutting the white wire and attaching it to the trailer frame. Installing 4 pin trailer wiring. 4 pin trailer light wiring diagram.

Rather than inspecting the old wires that were already corroded and falling apart i bought new 4 way trailer wiring and installed the electric myself. Click on the image below to enlarge it. 1 4 wire the first 4 pins white brown yellow green just like the 4 pin connector above. Blue electric brakes or hydraulic reverse disable see blue wire notes below in the trailer wiring diagram and connector application chart below use the first 5 pins and ignore the rest.

Use on a small motorcycle trailer snowmobile trailer or utility trailer. Many trailers have three circuits. Above we have describes the main types of trailer wiring diagrams. Can also be used as custom wiring on trailers with 3 light wire systems.

The red and blue wire can be used for brake control or auxiliary.