When it comes to towing a trailer, having the right wiring setup is crucial. One of the most commonly used plug types for trailers is the 5 pin round plug. In this article, we will provide a comprehensive guide on how to wire a 5 pin round trailer plug to ensure your trailer’s lights and other electrical components are working properly.
What is a 5 Pin Round Trailer Plug?
A 5 pin round trailer plug is a type of electrical connector used to connect a trailer’s wiring system to the towing vehicle’s wiring system. It features five pins arranged in a circular shape and is typically used for small to medium-sized trailers.
The pins on a 5 pin round trailer plug are typically numbered, and each pin serves a specific function. The pins are typically arranged in the following configuration:
| Pin Number | Function |
|---|---|
| 1 | Left turn signal |
| 2 | Ground |
| 3 | Right turn signal |
| 4 | Tail/running lights |
| 5 | Brake lights |
How to Wire a 5 Pin Round Trailer Plug
Wiring a 5 pin round trailer plug is a relatively simple process, but it is important to ensure that the wiring is done correctly to avoid any issues when towing your trailer. The following steps will guide you through the process:
Step 1: Gather Materials
Before you begin wiring your 5 pin round trailer plug, you will need to gather the necessary materials. This includes:
- 5 pin round trailer plug
- Wire strippers
- Electrical tape
- Wire connectors or soldering equipment
- A wiring diagram for your specific trailer
Step 2: Strip the Wires
Using your wire strippers, carefully strip the wires on your trailer harness. Each wire should be stripped back approximately 1/2 inch.
Step 3: Connect the Wires to the Plug
Using your wiring diagram as a guide, connect each wire to its corresponding pin on the 5 pin round trailer plug. This may require the use of wire connectors or soldering equipment.
Step 4: Test the Wiring
Once all of the wires are connected, test the wiring by plugging the trailer plug into your towing vehicle and turning on your trailer’s lights. Make sure all of the lights are working properly.
Step 5: Secure the Wiring
Once you have confirmed that the wiring is working properly, use electrical tape or zip ties to secure the wiring and prevent any damage while towing.
FAQ
What is the difference between a 4 pin and 5 pin round trailer plug?
A 4 pin round trailer plug is typically used for trailers with a basic lighting system, while a 5 pin round trailer plug is used for trailers with more advanced lighting systems that include separate brake lights and turn signals.
Can I use a 5 pin round trailer plug on a larger trailer?
While a 5 pin round trailer plug can technically be used on a larger trailer, it is generally recommended to use a larger plug type, such as a 7 pin round or 7 pin flat plug, for larger trailers.
What do I do if my trailer lights aren’t working?
If your trailer lights aren’t working, the first thing to check is the wiring. Make sure all of the connections are secure and that the wiring is not damaged. If the wiring appears to be in good condition, your trailer’s lighting system may have a more serious issue that requires professional assistance.
Do I need any special tools to wire a 5 pin round trailer plug?
You may need wire strippers, wire connectors or soldering equipment, and a wiring diagram for your specific trailer. All of these tools can be purchased at most hardware or automotive stores.
How often should I check my trailer’s wiring?
It is recommended to check your trailer’s wiring before each use to ensure that everything is working properly. Additionally, routine maintenance checks should be performed to ensure that the wiring is not damaged or corroded.
Conclusion
Wiring a 5 pin round trailer plug is a relatively simple process, but it is important to ensure that the wiring is done correctly to avoid any issues when towing your trailer. By following the steps outlined in this article and using a wiring diagram specific to your trailer, you can ensure that your trailer’s lights and other electrical components are working properly.
