When it comes to towing a trailer, having the right wiring setup is crucial to ensuring that the trailer lights and brakes work properly. One of the most common types of trailer plugs is the 5 prong plug, which is also known as the 5 way plug. This plug is typically used for trailers with electric brakes and a separate circuit for the brake lights. In this article, we’ll take a closer look at the 5 prong trailer plug wiring diagram and explain how it works.
What is a 5 Prong Trailer Plug?
A 5 prong trailer plug is a type of connector that allows you to connect your trailer’s lights and brakes to your vehicle’s electrical system. This plug has 5 pins that correspond to different functions, including the ground, the right turn signal, the left turn signal, the brake signal, and the running lights. The 5 prong trailer plug is commonly used in the United States and Canada, but different regions may have different wiring configurations.
What are the different types of 5 Prong Trailer Plugs?
There are two main types of 5 prong trailer plugs: the round plug and the flat plug. The round plug has a circular shape and is typically used for larger trailers, while the flat plug has a rectangular shape and is more commonly used for smaller trailers. Both types of plugs have the same 5 pins, but the wiring configuration may differ slightly.
What are the Benefits of a 5 Prong Trailer Plug?
One of the main benefits of using a 5 prong trailer plug is that it allows you to have a separate circuit for your trailer’s brake lights. This can be especially important if you are towing a heavy load or if your trailer has electric brakes. Additionally, the 5 prong plug is easy to install and can be found at most automotive or RV stores.
Wiring Diagram for a 5 Prong Trailer Plug
The following is a diagram that shows the standard wiring setup for a 5 prong trailer plug:
| Pin | Function | Wire Color |
|---|---|---|
| 1 | Ground | White |
| 2 | Right Turn Signal | Green |
| 3 | Left Turn Signal | Yellow |
| 4 | Brake Signal | Red |
| 5 | Running Lights | Brown |
How to Wire a 5 Prong Trailer Plug
Wiring a 5 prong trailer plug is a relatively simple process that can be done in a few steps:
- Start by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Strip about 1/2 inch of insulation from the end of each wire and twist the strands together.
- Connect the white wire to the ground pin on the plug.
- Connect the green wire to the right turn signal pin on the plug.
- Connect the yellow wire to the left turn signal pin on the plug.
- Connect the red wire to the brake signal pin on the plug.
- Connect the brown wire to the running lights pin on the plug.
- Screw the plug onto the trailer’s wiring harness and test the lights and brakes to make sure they are working properly.
FAQs
What if my trailer has a different wiring configuration than the standard 5 prong setup?
If your trailer has a different wiring configuration than the standard 5 prong setup, you may need to use an adapter to connect your trailer to your vehicle. Adapters can be found at most automotive or RV stores and come in a variety of configurations to match your specific needs.
What if my trailer doesn’t have electric brakes?
If your trailer doesn’t have electric brakes, you can still use a 5 prong trailer plug. Simply leave the brake signal pin disconnected and connect the remaining wires as described in the wiring diagram.
What if my trailer’s running lights aren’t working?
If your trailer’s running lights aren’t working, there could be a number of causes. Check to make sure that the bulb is not burnt out, the wiring is not damaged, and that the ground connection is secure. If all else fails, a professional mechanic or electrician may be needed to diagnose and repair the issue.
Can I switch from a 4 prong trailer plug to a 5 prong plug?
Yes, it is possible to switch from a 4 prong trailer plug to a 5 prong plug. However, you may need to modify or add wiring to your trailer to accommodate the additional pin. It is recommended that you consult a professional mechanic or electrician before attempting to make any modifications.
How often should I check my trailer’s wiring and electrical connections?
It is recommended that you check your trailer’s wiring and electrical connections before every trip. This can help prevent any issues that may arise while on the road and ensure that your trailer is operating safely and effectively.
Conclusion
The 5 prong trailer plug is a simple yet effective connector that can make towing a trailer safer and more convenient. By understanding the standard wiring configuration and following the proper installation procedures, you can ensure that your trailer’s lights and brakes are working as they should. If you have any questions or concerns about wiring your trailer, be sure to consult a professional mechanic or electrician.
