Below is the generic schematic of how the wiring goes. Installing the 4 pin trailer wires.
How To Wire A Trailer From 5 Wire To 4 Wire
Wiring a 4 prong trailer plug. Trailer electrical connectors come in a variety of shapes and sizes. Red black and blue are the three big wires then ther are five other i want to hook up a flat 4 prong hook up to my trailer which wires do i use my trailer connecter has four colors green brown white and yellow what goes where. I dont have a white wire coming out of my chevy 2006 pick up. Depending on the size of your trailer and the number of lights you might want to check on the internet for the recommended gauge for your specific trailer. Yellow and green are for left and right turns and braking. Note that this type of 4 pin connector is less common that 4 pin flat connector.
Cut the four pin plug off of the trailer harness. On a four prong plug one prong connects to the right turn signal one to the left and one to the tail lights. Buy a 4 pin wiring kit with wires at least twenty feet in length so its long enough for your trailer. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector. This accounts for three of the colors in the wiring harness. There must be a very consistent metal to metal contact for the ground wire.
One way to troubleshoot the voltage on the connector plug is to use a circuit tester. Above we have describes the main types of trailer wiring diagrams. There should be a common color for both the tail 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. 4 pin trailer wiring diagram. The remaining color is the ground wire.
To abide with state laws trailers must be equipped with the proper brake and tail lights and the trailer connector wiring adapter allows you to connect your vehicles electrical network. Allowing the tow vehicle to control the trailers lighting system. Wiring the 4 pin. Verify the harness color codes at each tail light. The ground wire should be run from the frame of the vehicle to the trailer. The most common wire thickness for a trailer is 16 gauge but i bought thicker wiring for added durability.
So do not run the wire from the bumper or the hitch of the car. By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights. The left and right turn signal lights should each have a different color. Start by cutting the white wire and attaching it to the trailer frame. You dont know if the wiring is bad or you have bad bulbs. The 4 pin standard flat style connector has four contacts with a male pin on the vehicle side for the ground.
To ensure your trailer has safe visible and legal lighting a trailer connector wiring adapter may be a necessary towing accessory. This type of connector is normally found on utvs atvs and trailers that do not have their own braking system. Youve connected the trailer to the vehicle but the turn signals and brake lights dont work.
Gallery of Wiring A 4 Prong Trailer Plug
