Trailer Breakaway Switch Wiring Diagram: Everything You Need to Know

When it comes to towing a trailer, safety should always be your top priority. One important component that ensures your trailer’s safety is the breakaway switch. In this article, we will go through everything you need to know about the trailer breakaway switch wiring diagram, including the purpose of the switch, how it works, and how to wire it correctly. Let’s get started!

What is a Trailer Breakaway Switch?

Before we dive into the wiring diagram, let’s first understand what a breakaway switch is and what its purpose is. A trailer breakaway switch is a safety device that activates the trailer brakes in case the trailer becomes disconnected from the tow vehicle. In the event of a separation, the switch activates the brakes to stop the trailer from rolling away, preventing potential accidents.

The breakaway switch is typically mounted on the trailer frame near the tongue, and it’s connected to the trailer’s brakes through a cable or rod. When the cable is pulled or the rod is removed, the switch triggers the brakes to engage, bringing the trailer to a stop.

How Does a Trailer Breakaway Switch Work?

The breakaway switch is a simple device that works by completing an electrical circuit. When the trailer is connected to the tow vehicle, the switch is in the “off” position, which means the circuit is open, and no power is flowing through it.

However, if the trailer becomes disconnected, the cable or rod attached to the switch will be pulled or removed, closing the circuit and completing the electrical connection. This sends power to the trailer’s brakes, causing them to engage and bring the trailer to a stop.

Trailer Breakaway Switch Wiring Diagram

Now that we understand the purpose and function of the breakaway switch, let’s take a look at how to wire it correctly. Keep in mind that the wiring diagram may vary depending on the type of breakaway switch you have, so always refer to the manufacturer’s instructions before wiring.

Step 1: Mount the Switch

Mount the breakaway switch on the trailer frame near the tongue, using the screws or bolts provided by the manufacturer. Make sure the switch is easily accessible and visible, and that the cable or rod is properly connected to the switch and the trailer’s brakes.

Step 2: Connect the Wires

The breakaway switch typically has three wires: black, white, and blue. The black wire goes to the positive terminal of the trailer’s battery, the white wire connects to the ground, and the blue wire goes to the trailer’s brake output circuit.

Before connecting the wires, make sure the battery is disconnected to avoid any accidental electric shocks or short-circuits. Once you have connected the wires, test the switch by pulling the cable or removing the rod to see if the brakes engage.

FAQs

Q: How often should I check my trailer breakaway switch?

A: It’s important to check your breakaway switch every time you connect your trailer to your tow vehicle. Make sure the switch is mounted securely, the cable or rod is properly connected, and the brakes are engaging correctly.

Q: Can I install a breakaway switch myself?

A: If you have some experience with electrical wiring, you can install a breakaway switch yourself. However, if you’re not comfortable with electrical work, it’s best to have it installed by a professional to ensure it’s wired correctly.

Q: Are breakaway switches required by law?

A: Yes, breakaway switches are required by law in most states. Make sure to check your local regulations to ensure your trailer is compliant.

Q: What should I do if my breakaway switch is activated?

A: If your breakaway switch is activated, it means the trailer has become disconnected from the tow vehicle. First, check to make sure everyone is safe and that there are no injuries. Then, fix the cause of the disconnection, and test the brakes and switch to ensure they are working correctly.

Conclusion

In conclusion, the trailer breakaway switch is a crucial safety component that should never be overlooked. Make sure your switch is mounted properly, wired correctly, and tested regularly to ensure it’s working as intended. For more information on trailer safety and maintenance, check out our other articles.