Round Trailer Plug Wiring Diagram

By | June 8, 2022



Using a standard round trailer plug wiring diagram is an important part of setting up your towing system correctly. Knowing how to wire your trailer correctly ensures that you have the safe and secure connection required for optimal performance between your tow vehicle and trailer.

For those new to the towing game, it can be confusing to determine which type of wiring is necessary for your specific setup. It’s important to understand that there are different types of round trailer plugs, each with their own unique wiring schematic. Understanding the differences in these types is key to ensuring your tow vehicle and trailer are properly connected.

The most common type of round trailer plug is the 7-way connector – typically used on larger trailers such as horse and livestock trailers. This type of connector requires seven separate wires in order to provide the proper power and signal transmissions. The most common colors used for the wires in a 7-way connector include black, red, white, green, yellow, blue, and brown. Knowing they color associated with each wire is absolutely imperative when wiring the trailer plug.

Other round trailer plugs may include the 4-way flat or 6-way square connecors. These connectors are often used on smaller trailers such as utility and cargo trailers. Both connectors require four or six separate wires, respectively. It is important to note that the colors of the wire associated with these connectors are somewhat different than those associated with the 7-way connector.

No matter which type of round trailer plug you are using, it is essential to consult the appropriate wiring schematic to ensure you have the proper connections. If you are installing a trailer plug for your vehicle, it is important to check with the manufacturer for detailed instructions on the wiring process. Additionally, professional installation is always recommended for safety purposes.

Having a correct and complete wiring system is an important part of any towing scenario. By understanding the components of each type of round trailer plug as well as consulting a wiring diagram, you can ensure your tow vehicle and trailer are properly connected and ready to go.


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