When you’re towing a trailer, it’s important to have functioning brakes. A two-axle trailer typically requires a brake controller, which sends a signal from the tow vehicle to the trailer brakes. In this article, we’ll explore the wiring diagram for a two-axle trailer brake system.
Understanding Trailer Brake Wiring
Before we dive into the wiring diagram, it’s important to understand the different components of a trailer brake system:
- Brake controller: This device is mounted in the tow vehicle and sends signals to the trailer brakes.
- Trailer brake assembly: This includes the brake shoes, drums, and other components that work together to stop the trailer.
- Trailer wiring harness: This connects the brake controller to the trailer brake assembly.
Now let’s take a closer look at the wiring diagram for a two-axle trailer brake system.
Wiring Diagram for a Two-Axle Trailer Brake System
The wiring diagram for a two-axle trailer brake system includes the following components:
- Power wire: This is usually a 12-volt power supply from the tow vehicle’s battery.
- Ground wire: This provides a path to ground for the entire system.
- Brake wire: This sends a signal from the brake controller to the trailer brakes.
- Brake switch wire: This wire tells the brake controller when to send a signal to the trailer brakes.
Here’s a diagram of how these wires are connected:
| Wire Color | Function |
|---|---|
| Black | 12-volt power supply from the tow vehicle’s battery |
| White | Ground |
| Blue | Electric brake signal from brake controller |
| Red | Cold side of brake switch |
| Tan | Hot side of brake switch |
It’s important to note that the wire colors may vary depending on the manufacturer and model of the brake controller and trailer.
FAQ
1. Do all two-axle trailers require brakes?
It depends on the weight of the trailer and the laws in your state or province. In general, if the trailer weighs more than 3,000 pounds, it will likely require brakes. Check with your local authorities to determine the requirements in your area.
2. How do I know if my brake controller is working properly?
Most brake controllers have a manual override feature that allows you to test the brakes without towing the trailer. Additionally, you can visually inspect the trailer brake assembly to ensure that it’s functioning properly.
3. Can I install a brake controller myself?
It’s possible to install a brake controller yourself, but we recommend consulting with a professional to ensure that it’s done correctly. An improperly installed brake controller can be dangerous and cause accidents.
4. How often should I inspect my trailer brake system?
You should inspect your trailer brake system before each trip, and have it professionally inspected at least once a year. Regular maintenance can help prevent accidents and ensure that your trailer brakes are functioning properly.
5. Can I use an electric brake controller with hydraulic brakes?
No, electric brake controllers are designed for electric trailer brakes only. If you have hydraulic trailer brakes, you’ll need a hydraulic brake controller.
A two-axle trailer brake system is a vital component of safe and effective towing. By understanding the wiring diagram and performing regular maintenance, you can help ensure that your trailer brakes are functioning properly and keep yourself and others safe on the road.
