Breakaway switches are essential components in any trailer system. They play a crucial role in ensuring that the trailer brakes are activated in case the trailer gets disconnected from the towing vehicle. However, for the breakaway switch to work correctly, the wiring must be done correctly. In this article, we will discuss the breakaway switch wiring diagram and provide a comprehensive guide on how to wire your breakaway switch correctly.
What is a Breakaway Switch?
A breakaway switch is a safety device that activates the trailer brakes in case the trailer gets disconnected from the towing vehicle. It is a switch that is installed on the trailer and connected to the trailer’s brakes. When the trailer becomes detached from the towing vehicle, the switch is activated, and it sends an electric signal to the trailer brakes, causing them to engage, and the trailer comes to a stop.
Breakaway switches are required by law in most states, and they are an essential part of any trailer system. They are designed to prevent accidents that can occur when a trailer becomes unhitched from the towing vehicle, especially when the trailer is carrying heavy loads.
How Does a Breakaway Switch Work?
A breakaway switch is a simple device that works by completing an electrical circuit. When the trailer is attached to the towing vehicle, the switch is in the “off” position, and the circuit is open. However, when the trailer becomes disconnected, the switch is activated, and it completes the circuit, sending an electric signal to the trailer brakes, causing them to engage.
Most breakaway switches come with a cable that attaches to the towing vehicle. If the trailer becomes disconnected, the cable pulls the switch, which activates the trailer brakes. The cable is usually attached to the towing vehicle with a carabiner or a similar device, and it must be long enough to allow for the trailer to turn without activating the switch.
Breakaway Switch Wiring Diagram
The breakaway switch wiring diagram is relatively simple, and it can be done by anyone with basic electrical skills. The diagram consists of four wires that connect the switch to the trailer’s braking system. The wires are usually color-coded for easy identification, and they include:
| Wire | Description |
|---|---|
| Blue wire | The blue wire connects to the trailer’s electric brakes. It carries the electric signal from the breakaway switch to the brakes, causing them to engage. |
| Black wire | The black wire is the ground wire. It provides a path for the electric current to flow back to the battery. |
| White wire | The white wire is the power wire. It carries the electric current from the battery to the switch. |
| Red wire | The red wire is the auxiliary power wire. It connects the switch to a power source on the towing vehicle, usually the battery. |
How to Wire a Breakaway Switch
Wiring a breakaway switch is a straightforward process that can be done quickly with the right tools and instructions. Here is a step-by-step guide on how to wire a breakaway switch:
Step 1: Mount the Switch
The first step in wiring a breakaway switch is to mount it on the trailer. The switch should be mounted in a location that is easily accessible and visible. Make sure the switch is securely mounted, and it is not in a location that can be damaged by road debris or other hazards.
Step 2: Connect the Blue Wire
The blue wire connects to the trailer’s electric brakes. Locate the wire that runs from the trailer’s electric brakes to the trailer’s braking system. Connect one end of the blue wire to the electric brake wire and the other end to the blue wire on the breakaway switch. Make sure the connection is secure and tight.
Step 3: Connect the Black Wire
The black wire is the ground wire. Connect one end of the black wire to the black wire on the breakaway switch and the other end to a grounding location on the trailer. Make sure the connection is secure and tight.
Step 4: Connect the White Wire
The white wire is the power wire. Connect one end of the white wire to the white wire on the breakaway switch and the other end to the positive terminal on the trailer’s battery. Make sure the connection is secure and tight.
Step 5: Connect the Red Wire
The red wire is the auxiliary power wire. Connect one end of the red wire to the red wire on the breakaway switch and the other end to a power source on the towing vehicle, usually the battery. Make sure the connection is secure and tight.
Breakaway Switch FAQ
What happens if a breakaway switch is not wired correctly?
If a breakaway switch is not wired correctly, it may not activate in case the trailer becomes disconnected from the towing vehicle. This can cause the trailer to continue moving, potentially causing accidents and damage to property.
Can I install a breakaway switch myself?
Yes, you can install a breakaway switch yourself if you have basic electrical skills. However, if you are not confident in your abilities, it is always best to seek the help of a professional.
Is a breakaway switch required by law?
Yes, breakaway switches are required by law in most states. The exact requirements may vary depending on the state, so it is essential to check your local regulations.
How often should I test my breakaway switch?
You should test your breakaway switch at least once a year or before any long trip. Testing the switch is simple and involves pulling the cable to activate the switch and ensure that the trailer brakes engage.
What should I do if my breakaway switch is not working correctly?
If your breakaway switch is not working correctly, you should seek the help of a professional. The switch may need to be replaced or repaired to ensure that it functions correctly.
Conclusion
Wiring a breakaway switch is a simple process that can be done by anyone with basic electrical skills. It is essential to ensure that the wiring is done correctly to ensure that the switch functions correctly in case of an emergency. Follow the steps in this guide to wire your breakaway switch correctly and ensure that your trailer system is safe and reliable.
