If you own a trailer, it’s essential to understand how trailer lights are wired. Trailer lights are critical for safe towing and are required by law in most states. In this article, we’ll provide you with a guide on how trailer lights are wired.
Wiring Basics
Trailer lights are typically powered by the tow vehicle’s electrical system. This means that the tow vehicle must have a wiring harness that connects to the trailer’s electrical system. The wiring harness provides power to the trailer’s running lights, brake lights, and turn signals.
The wiring harness typically consists of four or seven wires, depending on the type of connector used. Four-wire connectors are the most common and provide power to the running lights, left and right turn signals, and brake lights. Seven-wire connectors are less common but provide additional functionality, such as a reverse light, electric brakes, and a 12-volt power supply.
Wiring Diagram
To understand how trailer lights are wired, it’s essential to have a wiring diagram. A wiring diagram is a visual representation of the electrical system and shows the connections between various components.
A typical wiring diagram for a four-wire trailer system includes the following:
- White wire: Ground
- Brown wire: Running lights
- Yellow wire: Left turn signal and brake light
- Green wire: Right turn signal and brake light
For a seven-wire system, the wiring diagram will include additional wires for electric brakes, reverse lights, and a 12-volt power supply.
Wiring Process
Wiring your trailer lights can be a simple process with the right tools and knowledge. Here’s a step-by-step guide on how to wire your trailer lights:
- Disconnect the trailer from the tow vehicle and turn off the tow vehicle’s electrical system.
- Locate the trailer’s wiring harness and inspect it for damage or wear. Replace any damaged wiring before proceeding.
- Connect the wiring harness to the tow vehicle’s electrical system. This typically involves plugging the connector into the tow vehicle’s socket or splicing the wires together using wire connectors.
- Test the trailer lights to ensure they are functioning correctly. Turn on the tow vehicle’s electrical system and test each light individually, including the running lights, brake lights, and turn signals.
Conclusion
Understanding how trailer lights are wired is essential for safe and legal towing. Always refer to a wiring diagram and follow proper wiring practices when connecting your trailer lights. If you’re unsure about how to wire your trailer lights or encounter any issues, it’s always best to contact a professional RV service center like Etnoyer’s RV World in Highspire, PA. Their team of certified technicians can assist with any repairs or maintenance needed to keep your trailer’s electrical system functioning correctly