Trailer wiring can be a tricky job and if you don’t have the right knowledge, it can end up being a disaster. However, if you have the correct wiring diagram, it can make things much easier. In this article, we will be looking at the 7 way commercial trailer wiring diagram, which is commonly used in the trucking industry. This diagram consists of seven wires that control different functions of the trailer. We will discuss the function of each of these wires and how to connect them.
What is a 7 Way Commercial Trailer Wiring Diagram?
A 7 way commercial trailer wiring diagram is an electrical schematic that illustrates the wiring connections between tow vehicles and trailers. It is commonly used in the trucking industry for connecting heavy-duty trailers with a towing vehicle. The 7 way commercial trailer wiring diagram consists of seven wires that control different functions of the trailer. Each wire has a specific color code, and this color code is used to identify the function of each wire.
The 7 Wires in a 7 Way Commercial Trailer Wiring Diagram
The seven wires in a 7 way commercial trailer wiring diagram are usually color-coded to make it easier for the operator to identify which wire performs which function. The following is a breakdown of each of the seven wires:
| Wire Color | Function |
|---|---|
| Black | Battery Charge |
| Blue | Electric Brake |
| Brown | Tail Lights |
| Green | Right Turn Signal/Stop |
| Red | Left Turn Signal/Stop |
| White | Ground |
| Yellow | Auxiliary |
How to Connect a 7 Way Commercial Trailer Wiring Diagram
Connecting a 7 way commercial trailer wiring diagram requires some basic knowledge of electrical wiring. First, you need to check the wiring diagram of your towing vehicle to identify the wiring connections. Then, you need to match the wiring connections with the trailer wiring diagram.
To connect the wires, you need to strip the insulation off the ends of the wires and twist the exposed wire together. Then, you need to connect the wires to the corresponding terminals on the towing vehicle’s wiring harness. Make sure the connections are secure and the wires are well-insulated to prevent any electrical shorts.
FAQ
What is the purpose of a 7 way commercial trailer wiring diagram?
The purpose of a 7 way commercial trailer wiring diagram is to provide an electrical schematic that illustrates the wiring connections between tow vehicles and trailers. It is commonly used in the trucking industry for connecting heavy-duty trailers with a towing vehicle.
What are the colors of the wires in a 7 way commercial trailer wiring diagram?
The seven wires in a 7 way commercial trailer wiring diagram are usually color-coded to make it easier for the operator to identify which wire performs which function. The colors are black, blue, brown, green, red, white, and yellow.
How do you connect a 7 way commercial trailer wiring diagram?
To connect a 7 way commercial trailer wiring diagram, you need to strip the insulation off the ends of the wires and twist the exposed wire together. Then, you need to connect the wires to the corresponding terminals on the towing vehicle’s wiring harness.
What is the function of the blue wire in a 7 way commercial trailer wiring diagram?
The blue wire in a 7 way commercial trailer wiring diagram controls the electric brakes of the trailer. When the towing vehicle’s brakes are applied, the electric brakes in the trailer are activated through this wire.
What is the function of the yellow wire in a 7 way commercial trailer wiring diagram?
The yellow wire in a 7 way commercial trailer wiring diagram controls the auxiliary functions of the trailer, such as interior lights or backup lights.
What is the function of the white wire in a 7 way commercial trailer wiring diagram?
The white wire in a 7 way commercial trailer wiring diagram is the ground wire. It provides a path for the electrical current to return to the towing vehicle’s battery.
Conclusion
Knowing how to connect a 7 way commercial trailer wiring diagram can save you time and money. It is essential to have a good understanding of this wiring diagram, especially if you are in the trucking industry. Remember to check the wiring connections and make sure the wires are well-insulated to prevent any electrical shorts. With this knowledge, you can avoid any electrical problems that may arise while towing your heavy-duty trailer.
