Trailer wiring can be a tricky business, especially for those who are unfamiliar with the process. In order to tow a trailer safely and legally, it is important to have a good understanding of the wiring system. The 7 point trailer plug wiring diagram is a popular and reliable method of connecting a trailer to a tow vehicle. In this article, we will discuss the basic steps of trailer plug wiring and provide answers to some frequently asked questions.
Step-by-Step Guide to Wiring a 7 Point Trailer Plug
Follow these steps to wire a 7 point trailer plug:
| Color | Function | Suggested Gauge |
|---|---|---|
| White | Ground | 10 |
| Brown | Taillights | 14 |
| Green | Right turn and brake lights | 14 |
| Yellow | Left turn and brake lights | 14 |
| Blue | Brake controller output | 12 |
| Red | 12V power | 12 |
| Black | Auxiliary power | 10 |
Step 1: Gather the Necessary Tools
Before you begin, gather the following tools:
- Wire cutters/strippers
- Wire crimpers
- Electrical tape or heat shrink tubing
- 7 point trailer plug
- Trailer wiring harness
Step 2: Identify the Wires
Identify the wires in your trailer wiring harness to determine which wire corresponds to each function. The colors may vary depending on the manufacturer, but the functions should remain the same.
Step 3: Strip the Wires
Strip the insulation off the ends of each wire to reveal the bare copper. You may need to cut the wire to the appropriate length first.
Step 4: Connect the Wires to the Plug
Connect each wire to the appropriate terminal on the 7 point trailer plug using a wire crimping tool. Make sure the connection is secure and free of any loose strands of wire.
Step 5: Cover the Connections
Cover each connection with electrical tape or heat shrink tubing to protect it from the elements and prevent any potential short circuits.
Step 6: Test the Wiring
Test your wiring by connecting the trailer to your tow vehicle and checking that all lights and functions are working properly.
FAQs
What is a 7 point trailer plug?
A 7 point trailer plug is a wiring connector that allows a trailer to be connected to a tow vehicle. It consists of seven pins that correspond to different electrical functions.
What are the functions of a 7 point trailer plug?
The seven functions of a 7 point trailer plug are:
- Ground
- Taillights
- Right turn and brake lights
- Left turn and brake lights
- Brake controller output
- 12V power
- Auxiliary power
What gauge wire should I use for trailer wiring?
The gauge of wire you should use for trailer wiring depends on the function. The suggested gauges for each function in the 7 point trailer plug wiring diagram are:
| Color | Function | Suggested Gauge |
|---|---|---|
| White | Ground | 10 |
| Brown | Taillights | 14 |
| Green | Right turn and brake lights | 14 |
| Yellow | Left turn and brake lights | 14 |
| Blue | Brake controller output | 12 |
| Red | 12V power | 12 |
| Black | Auxiliary power | 10 |
What should I do if my trailer lights are not working?
If your trailer lights are not working, there may be a problem with the wiring. Check that all connections are secure and free of corrosion or damage. Also, make sure that the tow vehicle is properly wired and that there is no issue with the fuse or relay for the trailer lights. If you are unsure, consult a professional.
Do I need a brake controller for my trailer?
If your trailer has electric brakes, you will need a brake controller to activate them. Consult your trailer manufacturer or a professional to determine if your trailer has electric brakes and what type of brake controller is recommended.
