Installing your 4 pin trailer wiring system is easy if you follow the correct procedure. Standard color code for wiring simple 4 wire trailer lighting question.
Curt 56106 Vehicle Side Custom 4 Pin Trailer Wiring Harness For Select Toyota Sienna
Standard 4 pin trailer wiring. This type of connector is normally found on utvs atvs and trailers that do not have their own braking system. Make sure that all cables are electrically conductive. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector. 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. If it is not no amount of wiring will get the lights to work. Below is the generic schematic of how the wiring goes.
Use on a small motorcycle trailer snowmobile trailer or utility trailer. Use this 4 pin trailer wiring diagram to properly wire your 4 wire trailer plug. Note that this type of 4 pin connector is less common that 4 pin flat connector. 4 pin trailer wiring diagram. Standard 4 pole wiring harness for use with vehicles that have adequate power and standard wiring system these simply connect into existing wires on the vehicle and have a 4 pole flat connector to attach a trailer. Can also be used as custom wiring on trailers with 3 lightwire systems.
Allowing the tow vehicle to control the trailers lighting system. The most common wire thickness for a trailer is 16 gauge but i bought thicker wiring for added durability. Following the standard method for wiring a trailer connector is vital to the safety of your vehicle while towing. 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. The red and blue wire can be used for brake control or auxiliary. Trailer electrical connectors come in a variety of shapes and sizes.
If you do this connect the blue wire to the reverse lights on the vehicle side then be sure to note what youve done better yet use a purple wire and label it. The first thing you need to do is make sure that your connector works properly. This is not shown in the trailer wiring diagram above. Above we have describes the main types of trailer wiring diagrams. Buy a 4 pin wiring kit with wires at least twenty feet in length so its long enough for your trailer. By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights.
Some vehicles send only one signal per wire. Connecting the wrong color wires will result in mismatched taillight functions and confusion on the road. One way to check for faulty wires is to use a circuit tester. To ensure your trailer has safe visible and legal lighting a trailer connector wiring adapter may be a necessary towing accessory. Please note the 5th pin is not as standard as the first 4. 34 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white.
Be careful when using a 5 pin connector. I have had to mess with trailer wiring for years once or twice a year anyway and i just cannot keep the color code right ect whiteground brn running lights grn right turn yellow left turn. Converter for use with vehicles that have separate turn and brake light wires.
Gallery of Standard 4 Pin Trailer Wiring
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