If you own a PJ trailer, it is important to know how to wire it properly to ensure it works as intended. In this article, we will discuss the PJ trailer wiring diagram, including the different types of connectors, the wire colors, and how to troubleshoot any issues you may encounter.
Types of Connectors
There are two types of connectors used on a PJ trailer: the 7-way plug and the 4-way plug.
7-way Plug
The 7-way plug is the most common connector used on trailers in the United States. It has seven pins, with each pin having a specific function:
| Pin | Function |
|---|---|
| 1 | Left turn/brake light |
| 2 | Reverse light |
| 3 | Ground |
| 4 | Right turn/brake light |
| 5 | Electric brakes |
| 6 | Taillights |
| 7 | Auxiliary power |
The 7-way plug is typically used on trailers that require brakes, as it allows for the electric brake controller to be connected.
4-way Plug
The 4-way plug has four pins, with each pin having a specific function:
| Pin | Function |
|---|---|
| 1 | Left turn/brake light |
| 2 | Ground |
| 3 | Right turn/brake light |
| 4 | Taillights |
The 4-way plug is used on trailers that do not require brakes.
Wire Colors
Each wire in a PJ trailer has a specific color, and it is important to know what each wire is for to properly wire the trailer.
The wire colors for the 7-way plug are as follows:
| Wire Color | Function |
|---|---|
| White | Ground |
| Blue | Electric brakes |
| Green | Taillights |
| Yellow | Left turn/brake light |
| Brown | Right turn/brake light |
| Red | Auxiliary power |
| Black | Reverse light |
The wire colors for the 4-way plug are as follows:
| Wire Color | Function |
|---|---|
| White | Ground |
| Green | Taillights |
| Yellow | Left turn/brake light |
| Brown | Right turn/brake light |
Troubleshooting
If you encounter any issues with your PJ trailer wiring, there are a few things you can check to troubleshoot the problem.
No Lights
If none of the lights on your trailer are working, the first thing to check is the ground connection. Make sure it is properly connected and not corroded. If the ground connection is good, check the connection between the trailer and the tow vehicle. Make sure it is properly connected and the pins are not corroded.
Brake Lights Not Working
If the brake lights on your trailer are not working, check the brake light switch on the tow vehicle. If the switch is faulty, it may not be sending a signal to the trailer. Also, check the wiring between the tow vehicle and the trailer to ensure it is properly connected and not damaged.
No Power to Brakes
If there is no power going to the electric brakes on your trailer, check the brake controller on the tow vehicle. Make sure it is properly connected and functioning. Also, check the wiring between the tow vehicle and the trailer to ensure it is properly connected and not damaged.
FAQ
What size wire should I use for my PJ trailer?
The wire size you should use for your PJ trailer depends on the length of the trailer and the amperage draw of the lights and brakes. In general, 14-gauge wire is sufficient for most trailers, but larger trailers may require thicker wire.
Can I use a 4-way plug on a trailer that requires brakes?
No, you cannot use a 4-way plug on a trailer that requires brakes. The 4-way plug does not have the necessary wires to control the electric brakes.
What is the maximum amperage draw for my PJ trailer?
The maximum amperage draw for your PJ trailer depends on the size of the trailer and the number of lights and brakes. In general, the maximum amperage draw for a PJ trailer is around 20 amps.
Can I wire my PJ trailer myself?
Yes, you can wire your PJ trailer yourself if you have the necessary knowledge and tools. However, if you are not comfortable with electrical wiring, it is recommended that you have a professional do it for you.
