Having well-functioning trailer lights is not only essential for road safety but is also a legal requirement in most regions. Burnt-out or broken lights can be a hazard for you and other drivers on the road, making it crucial to replace them as soon as possible. At Mountain View Trailer Rentals, a leading provider of trailer rentals serving Calgary and Southern Alberta, we understand the importance of having proper lighting on your trailer. That’s why we have prepared this comprehensive guide to help you replace your trailer lights like a pro.

Whether you’re an experienced DIY enthusiast or a complete beginner, replacing trailer lights is a task that you can easily accomplish with a little guidance. By following the steps outlined in this blog, you can make sure your trailer lights are functioning optimally, ensuring your safety and that of others on the road. This guide covers the tools you’ll need, the types of trailer lights available, and a step-by-step process for replacing the lights. In no time at all, you’ll find you can easily tackle this essential task.

In addition to offering high-quality trailer rentals, Mountain View Trailer Rentals also offers a wide range of valuable services that cater to all your trailer needs. Our expert team is committed to helping you keep your trailer in top-notch condition. So without further ado, let’s shed some light on how you can replace your trailer lights like a pro, ensuring proper visibility and safety on the road.

Required Tools and Materials for Replacing Trailer Lights

Before getting started on replacing your trailer lights, ensure you have all the necessary tools and materials on hand. Here is a list of items you’ll need for this project:

1. New trailer lights: Depending on your trailer setup, you may require tail lights, side marker lights, or clearance lights. Make sure to check your trailer’s specifications and purchase the appropriate lights compatible with your trailer.

2. Screwdriver or wrench: These tools will be needed to remove and install any mounting hardware or fixtures.

3. Wire stripper and crimping tool: These tools are essential for working with the electrical connections to your trailer lights.

4. Electrical connectors: You will need wire connectors and crimp caps to securely connect the new trailer lights to your existing wiring.

5. Electrical tape or heat shrink tubing: These materials are used to seal and insulate the new wiring connections.

Types of Trailer Lights

Different types of trailer lights serve various purposes to ensure your trailer is safely visible on the road. Make sure you identify the specific types of lights your trailer requires and purchase the correct replacements. Here are some common types of trailer lights:

1. Tail lights: These are located at the rear of the trailer and typically include brake lights, turn signals, and reverse lights.

2. Side marker lights: These small lights are found along the sides of the trailer and help to indicate the trailer’s width and length to other drivers.

3. Clearance lights: Clearance lights are positioned at the top front corners of the trailer and serve to indicate the trailer’s height and width.

4. License plate lights: These lights illuminate your trailer’s license plate for easy identification on the road.

Step-by-Step Guide to Replacing Your Trailer Lights

Now that you have gathered the necessary tools and materials, follow these steps to replace your trailer lights like a pro:

Step 1: Remove the old trailer light

Unhook your trailer from the tow vehicle, ensuring the electrical connector is disconnected. Then, use a screwdriver or wrench to remove the mounting hardware or fixtures that secure the old trailer light. Carefully disconnect the electrical connections, taking note of the wire colours and their appropriate connections.

Step 2: Prepare the wiring

Using a wire stripper, strip approximately half an inch of insulation from the ends of the wires connecting to your new trailer light. For the existing trailer wires, if the ends are dirty or corroded, strip them back to expose fresh wire.

Step 3: Connect the new trailer light

Using the appropriate connectors, securely connect the wires from your new light to the existing trailer wiring. Be sure to match each wire colour (e.g., white to white, brown to brown) and tightly crimp the connectors using a crimping tool.

Step 4: Seal and insulate the connections

To prevent moisture and corrosion, seal the connections with electrical tape or heat shrink tubing. Slide the tubing over the connection, then either apply heat with a heat gun or use a lighter (carefully) to shrink the tubing snugly around the connection.

Step 5: Mount the new trailer light

Once the wiring connections are complete, secure the new trailer light in place using the included mounting hardware or fixtures. Ensure the light is properly positioned and tightly fastened.

Step 6: Test the new trailer light

Finally, reconnect your trailer to the tow vehicle and test the new lights by operating the brake lights, turn signals, and other relevant functions. Ensure that all lights are functioning correctly before hitting the road.

Troubleshooting Trailer Light Issues

If your new trailer light is not working correctly, here are some troubleshooting tips to resolve common issues:

1. Check the wiring connections: Double-check that each wire has been connected correctly, with matching colours and securely crimped connectors.

2. Inspect the ground connection: A poor ground connection can cause issues with trailer lights. Ensure the ground wire is connected to a clean and unpainted metal surface on the trailer frame.

3. Examine the tow vehicle connector: Dirty or corroded connections on the tow vehicle’s electrical socket can cause trailer light issues. Clean the socket contacts using a small wire brush to remove any dirt or corrosion.

4. Test voltage and fuses: If your trailer lights are still not functioning correctly, use a multimeter to test for voltage at the tow vehicle’s electrical socket. Also, inspect the tow vehicle’s fuses related to the trailer lighting circuit and replace any that may be blown.


Replacing trailer lights is a straightforward task that any DIY enthusiast can confidently tackle. Ensuring your trailer has functioning lights is not only a legal requirement but is also essential for road safety. By following our detailed step-by-step guide, you can replace your trailer lights like a pro and maintain a safe and visible presence on the road.

Looking for reliable and affordable trailer rental services in Calgary and Southern Alberta? Look no further than Mountain View Trailer Rentals! With two convenient locations and a wide selection of trailers to choose from, we’ve got you covered for all your hauling needs. Contact us today to book your trailer rental and experience our exceptional customer service!

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