If you’re planning to tow a trailer, you need to have a basic understanding of the wiring system that connects your vehicle to the trailer. One of the most common types of wiring systems used in Australia is the 7 Pin Flat Plug. In this article, we will provide you with a comprehensive guide on the 7 Pin Flat Plug wiring diagram, including how it works, what each pin does, and how to wire it correctly.
What is a 7 Pin Flat Plug?
A 7 Pin Flat Plug is a type of trailer plug that is commonly used in Australia. It consists of seven pins or connectors, which are used to connect the trailer to the towing vehicle. These pins transmit power, signal, and data between the trailer and the towing vehicle.
Pin Configuration
The pins on a 7 Pin Flat Plug are numbered from 1 to 7, and each pin has a specific function. The table below shows the pin configuration and their corresponding function.
| Pin Number | Function |
|---|---|
| 1 | Left-hand turn signal |
| 2 | Reverse light |
| 3 | Earth/ground |
| 4 | Right-hand turn signal |
| 5 | Electric brakes |
| 6 | Tail/number plate light |
| 7 | Battery charge |
How to Wire a 7 Pin Flat Plug Correctly
Wiring a 7 Pin Flat Plug is a simple process, and anyone can do it with some basic knowledge and tools. The steps below will guide you on how to wire a 7 Pin Flat Plug correctly.
Step 1: Gather the Necessary Tools and Materials
Before you start wiring the 7 Pin Flat Plug, you need to gather the following tools and materials:
- Wire strippers
- Electrical tape
- Crimping tool
- 7 Pin Flat Plug
- Trailer cable (minimum 5-core)
Step 2: Connect the Wires to the Pins
Using the pin configuration table above, connect the trailer cable wires to the corresponding pins on the 7 Pin Flat Plug. Use the wire strippers to remove the insulation from the ends of the wires before crimping them onto the pins. Make sure that each wire is securely connected to the pin and that there is no exposed wiring.
Step 3: Test the Wiring
Once you have connected all the wires to the pins, it’s time to test the wiring. Plug the 7 Pin Flat Plug into the socket on the towing vehicle and check that all the lights and other electrical components on the trailer are working correctly. If there are any issues, double-check the wiring connections and try again.
FAQs
What is the difference between a 7 Pin Flat Plug and a 7 Pin Round Plug?
The main difference between a 7 Pin Flat Plug and a 7 Pin Round Plug is the shape of the plug. The Flat Plug has a rectangular shape, while the Round Plug has a circular shape. Both types of plugs have the same pin configuration, so they can be used interchangeably.
Can I wire a 7 Pin Flat Plug myself?
Yes, you can wire a 7 Pin Flat Plug yourself if you have some basic knowledge and tools. However, if you are not confident in your abilities, it’s best to hire a professional to do the job for you.
What is the maximum weight that a trailer can be towed using a 7 Pin Flat Plug?
The maximum weight that a trailer can be towed using a 7 Pin Flat Plug depends on the towing vehicle’s capacity and the type of trailer. As a general rule, trailers with a gross weight of up to 3500kg can be towed using a 7 Pin Flat Plug.
What is the difference between a 7 Pin Flat Plug and a 12 Pin Flat Plug?
The main difference between a 7 Pin Flat Plug and a 12 Pin Flat Plug is the number of pins or connectors. The 12 Pin Flat Plug has twelve pins and is used for larger trailers and caravans. The additional pins allow for more functionality, such as additional lighting, auxiliary power, and electric trailer brakes.
Do I need a special adapter to connect a 7 Pin Flat Plug to a 12 Pin Flat Plug socket?
Yes, you will need a special adapter to connect a 7 Pin Flat Plug to a 12 Pin Flat Plug socket. The adapter will allow you to connect the pins on the 7 Pin Flat Plug to the corresponding pins on the 12 Pin Flat Plug socket.
Is it safe to tow a trailer without a properly wired plug?
No, it is not safe to tow a trailer without a properly wired plug. A properly wired plug ensures that the trailer’s electrical components are working correctly, making it easier and safer to tow the trailer. If the plug is not wired correctly, you risk damaging your trailer, your towing vehicle, or causing an accident.
Conclusion:
The 7 Pin Flat Plug is a standard type of trailer plug used in Australia. Understanding the wiring diagram and how to wire it correctly is essential for anyone planning to tow a trailer. By following the steps outlined in this article and using the pin configuration table, you can ensure that your trailer’s electrical components are working correctly and that you can tow your trailer safely and effectively.
