Trailer connectors are essential for towing any kind of trailer, and a 7 blade trailer connector is one of the most common types of connectors you will come across when it comes to towing heavy trailers. In this article, we will discuss everything you need to know about the 7 blade trailer connector wiring diagram, including the functions of each wire, how to wire the connector, tips for troubleshooting, and more.
What is a 7 Blade Trailer Connector?
A 7 blade trailer connector is a connector that has seven pins, each of which serves a specific function. The seven pins are arranged in a circular pattern in a metal or plastic housing that plugs into the tow vehicle’s receptacle to provide power to the trailer’s lights and brakes.
The 7 blade trailer connector is commonly used for towing larger trailers, such as horse trailers, camper trailers, and utility trailers that require more electrical power than the typical 4 pin or 5 pin connector can provide.
Functions of Each Wire in a 7 Blade Trailer Connector
Understanding the functions of each wire in a 7 blade trailer connector is essential to ensure that the wiring is correct and compatible with the trailer’s electrical system. The seven wires in a 7 blade trailer connector are as follows:
| Wire Color | Function |
|---|---|
| White | Ground |
| Blue | Electric brakes |
| Green | Tail/running lights |
| Black | Battery charging |
| Red | Reverse lights |
| Brown | Right turn signal/brake lights |
| Yellow | Left turn signal/brake lights |
The colors of the wires may vary from one manufacturer to another, so it is important to check the wiring diagram that came with the connector to ensure that you are wiring it correctly.
How to Wire a 7 Blade Trailer Connector
Wiring a 7 blade trailer connector is not difficult, but it does require some basic knowledge of electrical circuits and the use of the right tools. Here are the steps to follow:
Step 1: Gather the Tools You Need
You will need a wire stripper, crimpers, electrical tape, and a wiring diagram for the connector you are using.
Step 2: Strip the Wires
Strip about 1/2 inch of insulation from each wire using a wire stripper.
Step 3: Crimp the Wires to the Connector
Insert each wire into the appropriate slot in the connector and crimp it securely using a crimper. Use the wiring diagram to make sure that each wire is connected to the right slot.
Step 4: Wrap the Connections with Electrical Tape
Wrap each connection with electrical tape to protect it from moisture and other elements that can cause corrosion.
Tips for Troubleshooting a 7 Blade Trailer Connector
If you are having trouble with your 7 blade trailer connector, here are some tips to help you troubleshoot the problem:
Check the Ground Connection
The most common cause of trailer electrical problems is a poor ground connection. Check the ground connection on both the tow vehicle and the trailer to ensure that it is clean and secure.
Test Each Wire with a Multimeter
Use a multimeter to test each wire in the connector to ensure that it is receiving power. If a wire is not receiving power, it may be loose or damaged.
Check the Fuses
Check the fuses in the tow vehicle’s fuse box to ensure that they are not blown. Blown fuses can cause electrical problems that affect the trailer’s lights and brakes.
Conclusion
A 7 blade trailer connector is a reliable and durable connector that can provide the electrical power needed to tow heavy trailers. Understanding the functions of each wire in the connector, how to wire it correctly, and how to troubleshoot common problems is essential to ensure that your trailer is safe and roadworthy. Use the tips and information in this article to get started with wiring your 7 blade trailer connector.
