6 Wire Trailer Wiring Diagram

Hello and welcome to our comprehensive guide on the 6 wire trailer wiring diagram. Whether you are a seasoned DIY enthusiast or a beginner, understanding the wiring diagram for your trailer is crucial for a safe and efficient towing experience. In this article, we will walk you through the various components and connections involved in a 6 wire trailer wiring system, highlighting its advantages, disadvantages, and alternative options. So, let’s dive in!

1. Understanding the Basics

Before we delve into the specifics of the 6 wire trailer wiring diagram, let’s first understand the basic components involved. A 6 wire trailer wiring system typically consists of six wires with different colors, each serving a specific purpose. These wires include:

Wire Color Purpose
Brown Tail Lights
Yellow Left Turn Signal
Green Right Turn Signal
White Ground
Blue Electric Brakes
Red Battery Charge or Auxiliary Power

Now that we have a basic understanding of the wire colors and their purposes, let’s move on to the wiring diagram itself.

2. The 6 Wire Trailer Wiring Diagram

The 6 wire trailer wiring diagram provides a visual representation of how the wires should be connected to ensure proper functionality. Here is an example of a typical 6 wire trailer wiring diagram:

6 Wire Trailer Wiring DiagramSource: None

As shown in the diagram, each wire color corresponds to a specific function. It is important to follow this diagram precisely to avoid any electrical issues while towing your trailer. Let’s discuss the functions of each wire in detail.

2.1 Brown Wire – Tail Lights

The brown wire is responsible for powering the tail lights of your trailer. When connected correctly, it ensures that the tail lights illuminate whenever the vehicle’s headlights are turned on. This is crucial for visibility and safety, especially during nighttime towing.

2.2 Yellow Wire – Left Turn Signal

The yellow wire is used to activate the left turn signal lights on your trailer. When the vehicle’s left turn signal is engaged, the yellow wire carries the necessary electrical signal to illuminate the left turn signal lights, indicating your intention to turn left. This helps other drivers on the road to anticipate your movements and ensures safe turning.

2.3 Green Wire – Right Turn Signal

Similar to the yellow wire, the green wire is responsible for activating the right turn signal lights on your trailer. When the vehicle’s right turn signal is engaged, the green wire transmits the electrical signal to illuminate the right turn signal lights, signaling your intention to turn right. This is crucial for safe and efficient lane changes and turns.

2.4 White Wire – Ground

The white wire serves as the ground connection for your trailer’s electrical system. It provides a path for the electrical current to return to the vehicle’s battery or electrical system, completing the circuit. Proper grounding is essential for preventing electrical malfunctions and ensuring the overall safety of your trailer.

2.5 Blue Wire – Electric Brakes

The blue wire is specifically used for trailers equipped with electric brakes. When connected correctly, it activates the electric brakes whenever the vehicle’s brake pedal is pressed. This provides additional braking power and control, especially when towing heavy loads. However, not all trailers have electric brakes, so ensure your trailer is equipped with them before connecting the blue wire.

2.6 Red Wire – Battery Charge or Auxiliary Power

The red wire is used to supply battery charge or auxiliary power to your trailer. It can be connected to the vehicle’s battery or an auxiliary power source, providing power for various accessories such as interior lights, electric winches, or charging systems. This wire is optional and may not be present in all trailer wiring setups.

3. Advantages and Disadvantages of 6 Wire Trailer Wiring

Now that we have explored the 6 wire trailer wiring diagram in detail, let’s discuss its advantages and disadvantages:


  • Provides separate circuits for tail lights, turn signals, electric brakes, and auxiliary power, ensuring efficient functionality.
  • Allows for the use of electric brakes, providing enhanced safety and control while towing heavy loads.
  • Enables the powering of various accessories through the auxiliary power wire.


  • Requires proper installation and connection to ensure functionality and avoid electrical issues.
  • Not all trailers are equipped with electric brakes or require auxiliary power, making some wires unnecessary.
  • Can be more complicated to install compared to simpler wiring systems.

It is important to weigh these advantages and disadvantages when considering the 6 wire trailer wiring system for your specific towing needs.

4. Alternative Options

If the 6 wire trailer wiring system seems too complex or unnecessary for your trailer, there are alternative options available. One popular alternative is the 4 wire trailer wiring system. This simplified system eliminates the electric brakes and auxiliary power wires, providing a basic setup for trailers without those requirements. However, it is essential to ensure your trailer’s electrical needs are compatible with the chosen wiring system before making any modifications.

5. Frequently Asked Questions (FAQ)

Q: Can I use different wire colors for my trailer wiring?

A: While it is not recommended, you can use different wire colors as long as you follow a consistent color-coding system and ensure proper connections. However, using standard wire colors is strongly advised for easier troubleshooting and compatibility with other trailers and vehicles.

Q: Can I install the trailer wiring system myself?

A: Yes, if you have basic knowledge of electrical systems and wiring, you can install the trailer wiring system yourself. However, it is recommended to consult a professional or refer to the manufacturer’s guidelines for your specific trailer model to ensure proper installation and functionality.

In conclusion

Understanding the 6 wire trailer wiring diagram is essential for a safe and efficient towing experience. By following the wiring diagram and connecting the wires correctly, you can ensure proper functionality of your trailer’s electrical system. Consider the advantages and disadvantages of the 6 wire system in comparison to alternative options, and always prioritize safety when towing. Happy towing!