4 Blade Trailer Wiring Diagram – The Ultimate Guide

Are you planning to wire your trailer and don’t know where to start? If yes, you’ve come to the right place. In this article, we’ll provide a detailed guide on the 4 blade trailer wiring diagram, including step-by-step instructions, FAQ, and tables that will make the installation process a breeze.

What is a 4 Blade Trailer Wiring Diagram?

A 4 blade trailer wiring diagram is a visual representation of how the electrical wiring of a trailer should be connected to the towing vehicle. It consists of four wires that provide power and signal to the trailer’s lights and brakes. The four wires are typically colored differently, with each color representing a specific function.

The Four Wires and Their Functions

The four wires of a 4 blade trailer wiring diagram are:

Wire Color Function
Brown Tail/Marker lights
Yellow Left turn and brake lights
Green Right turn and brake lights
White Ground

The brown wire connects to the tail lights of the trailer and provides illumination when the towing vehicle lights are turned on. The yellow and green wires are connected to the left and right turn and brake lights of the trailer, respectively. The white wire connects to the ground to complete the circuit.

How to Wire a 4 Blade Trailer

Here’s a step-by-step guide on how to wire a 4 blade trailer:

Step 1: Gather the Tools and Materials

Before you begin, make sure you have the necessary tools and materials, including:

  • Wire strippers
  • Crimping tool
  • Electrical tape
  • 4 blade trailer wiring kit
  • Towing vehicle with a hitch and wiring harness

Step 2: Prepare the Trailer

Start by preparing the trailer. Locate the tail and brake lights and remove the lenses to expose the wiring. Strip about 1/2 inch of insulation from each wire and twist the strands together to form a tight connection.

Step 3: Connect the Wires

Take the 4 blade trailer wiring kit and locate the four colored wires. Match each wire to the corresponding wire on the trailer and connect them using wire connectors or crimping tools. Wrap the connections with electrical tape to secure them.

Step 4: Connect the Ground Wire

Locate a good grounding spot on the trailer, such as a metal frame or chassis, and connect the white ground wire to it. Make sure the connection is secure and protected with electrical tape.

Step 5: Test the Trailer Lights

Once you’ve connected all the wires, test the trailer lights to make sure they’re working correctly. Turn on the towing vehicle lights and check that all the trailer lights are lit up. Have someone step on the brakes and turn signals to ensure they’re working correctly.

FAQ

What is the difference between a 4 blade and 7 blade trailer wiring diagram?

A 4 blade trailer wiring diagram has four wires for the tail, brake, and turn signal lights, while a 7 blade trailer wiring diagram has seven wires that provide power and signal to the tail and brake lights, turn signals, reverse lights, and auxiliary power.

What gauge wire should I use for trailer lights?

It’s recommended to use 18 or 16 gauge wire for trailer lights, which is sufficient for the amount of power needed to illuminate the lights.

How do I troubleshoot trailer lights that aren’t working?

If your trailer lights aren’t working, the first thing to check is the wiring connections. Make sure all the wires are securely connected and not corroded. Check the bulbs to ensure they’re not burnt out, and replace them if necessary. If the problem persists, you may need to have a professional diagnose the issue.

Conclusion

Wiring a trailer may seem like a daunting task, but with this 4 blade trailer wiring diagram guide, the process is straightforward and hassle-free. Follow the step-by-step instructions, and you’ll be on your way to safely towing your trailer in no time. If you have any questions or need further assistance, don’t hesitate to seek help from a professional or contact the manufacturer for guidance.