Trailer wiring can be a tricky business, especially for those who are new to it. However, one thing that is common to most trailers is the 6-way square wiring design. It is a popular wiring system used in trailers that have more than one light or electrical component. In this article, we will provide an in-depth guide on the 6-way square trailer wiring diagram. You’ll learn everything you need to know about wiring your trailer properly and safely.
What is a 6-way square trailer wiring diagram?
Before we dive deeper into the nuts and bolts of 6-way square trailer wiring, let’s answer the most basic question: what is it? The 6-way square trailer wiring diagram is a wiring system that is used in trailers that have more than one light or electrical component, such as brake lights, turn signals, and running lights. It is a six-wire system that connects the trailer to the towing vehicle.
The six wires in the 6-way square wiring system are color-coded and serve different purposes. Understanding the color-coding is essential for proper wiring, which we will cover later in this article.
Why is it important to have a proper wiring system in your trailer?
A proper wiring system in your trailer is essential for two main reasons: safety and legality. First, a well-wired trailer ensures that all lights and electrical components work properly, which makes it safer to drive. Second, all trailers must meet certain legal requirements, including those related to lighting and electrical systems, which differ depending on your location. Having a properly wired trailer ensures that you don’t run afoul of any regulations and can avoid penalties.
The six wires in 6-way square trailer wiring diagram and their functions
The six wires in the 6-way square trailer wiring diagram are color-coded and serve different functions. Here is a breakdown of each wire and its function:
| Wire color | Function |
|---|---|
| Brown | Tail/running lights |
| Green | Right turn signal/right brake light |
| Yellow | Left turn signal/left brake light |
| White | Ground wire |
| Blue | Electric brake output |
| Black | 12V power supply |
Brown wire
The brown wire in the 6-way square trailer wiring system is responsible for powering the tail/running lights. These lights are located at the rear of the trailer and are always on while the trailer is in use. They help improve visibility of your trailer and indicate its presence on the road.
It’s important to note that some trailers may not have tail/running lights, in which case this wire may not be present.
Green wire
The green wire is responsible for powering the right turn signal and right brake light on the trailer. These lights indicate to other drivers that you are turning right or braking, respectively.
Yellow wire
The yellow wire is responsible for powering the left turn signal and left brake light on the trailer. These lights indicate to other drivers that you are turning left or braking, respectively.
White wire
The white wire is the ground wire and is responsible for completing the electrical circuit. It connects the trailer to the towing vehicle and provides the return path for any electrical current.
Without a properly grounded trailer, electrical components may malfunction or not work at all.
Blue wire
The blue wire is responsible for supplying power to the trailer’s electric brakes. This wire is only present in trailers with electric brakes, which are typically larger trailers that require extra stopping power.
Black wire
The black wire in the 6-way square trailer wiring system is the 12V power supply wire. It provides power from the towing vehicle’s battery to the trailer’s electrical components.
It’s important to note that this wire is always “hot” and should only be connected when the towing vehicle is in use.
How to wire a 6-way square trailer wiring diagram
Wiring a 6-way square trailer wiring diagram requires some basic knowledge of electrical systems and color-coding. Here are the steps to follow:
Step 1: Gather tools and materials
Before you start wiring, make sure you have the necessary tools and materials on hand. You’ll need:
- Wire strippers
- Wire connectors (screw-on or crimp-on)
- Electrical tape
- A wire tester (optional)
You’ll also need to purchase the appropriate wire, which should be rated for the amperage of your trailer’s electrical components.
Step 2: Strip the wires
Using your wire strippers, carefully strip the ends of each wire to expose the bare metal conductor. You should leave enough wire exposed to connect to the appropriate wire in the towing vehicle.
Step 3: Connect the wires
Using your wire connectors, connect each wire in the trailer to the appropriate wire in the towing vehicle. Make sure each connection is tight and secure, and use electrical tape to cover any exposed wire or connectors.
You can use a wire tester to ensure that each connection is properly wired, but this is optional.
FAQ
What is the difference between a 6-way square and a 7-way round trailer wiring diagram?
A 7-way round trailer wiring diagram is similar to a 6-way square wiring system, but it has an extra wire for powering the reverse lights on the trailer. If your trailer has reverse lights, you’ll need to use a 7-way round wiring diagram instead.
How do I troubleshoot a problem with my trailer’s electrical system?
If your trailer’s electrical system isn’t working properly, the first step is to check the wiring for any loose connections or damaged wires. You can use a wire tester to check for continuity and ensure that each wire is properly connected. If you cannot determine the source of the problem, it may be best to take your trailer to a professional for repair.
Can I wire my trailer myself or should I hire a professional?
Wiring a trailer yourself is certainly possible if you have some basic knowledge of electrical systems and color-coding, but it requires a certain level of skill and attention to detail. If you’re not confident in your abilities, it may be best to hire a professional to do the job for you.
What are the legal requirements for trailer lighting and electrical systems?
The legal requirements for trailer lighting and electrical systems vary depending on your location. In general, you’ll need to ensure that your trailer has functioning lights for tail/running lights, turn signals, and brake lights. You’ll also need to make sure that your trailer meets any other requirements related to its size, weight, and purpose. Check with your local DMV or transportation department for specific requirements in your area.
