How to Replace a Side Mirror on a Semi Truck: A Step-by-Step Guide

Provided by: DIY SEMI

Replacing the side mirror on your semi-truck might seem daunting, but with a little know-how, you can save significant money on mechanic fees. This guide will walk you through the simple steps of changing the West Coast mirror on a 2019 Freightliner Cascadia, ensuring you're back on the road with minimal downtime.

What You'll Need:

• Replacement mirror

• Flathead screwdriver or a similar prying tool

• Pocket knife (optional, for tight latches)

• New gloves and eye protection for safety

Step-by-Step Guide:

Step 1: Prepare the Area

• Ensure your truck is parked safely and that you have ample room to work around the mirror.

Step 2: Remove the Old Mirror

• Tilt the mirror outward to gain access to the mounting latch at the back.

• If the latch is tight or stuck due to exposure (like road salt), carefully use a flathead screwdriver or a pocket knife to pry it open. Exercise caution to avoid injury or damaging the mirror.

• Disconnect the two wires connected to the heating element of the mirror.

Step 3: Install the New Mirror

• Connect the wires for the heating element to the corresponding terminals on the new mirror.

• Align the mounting dimples on the mirror with the slots in the holder.

• Secure the mirror by snapping the latch closed, ensuring it locks into place.

Step 4: Test the Installation

• Adjust the mirror using the vehicle’s controls to ensure full range of motion and that the heating element functions correctly.

Tips for Safety and Efficiency:

• Wear Safety Gear: Always wear gloves and safety glasses to protect against accidental scrapes and exposure to elements.

• Check Connections: Ensure all electrical connections are secure to avoid malfunctions, especially with the heated mirror feature.

• Regular Maintenance: Regularly check and clean your mirrors to maintain visibility and safety.

Common Issues with Mirrors and Their Fixes:

• Cracked Mirror: Replace immediately to avoid visibility issues.

• Loose Mounting: Tighten all fittings and ensure the latch is securely locked.

• Electrical Faults: Check wiring connections and ensure no wires are pinched or worn.

Replacing a side mirror on your semi-truck is a straightforward task that you can accomplish with basic tools and a bit of patience. Remember, maintaining your vehicle's components not only ensures your safety but also the longevity of your truck.

For a wide selection of mirrors and other essential truck parts, visit FinditParts. Explore our extensive inventory to find exactly what you need for your semi-truck. Don’t forget to watch the full video tutorial by DIY Semi for more detailed guidance, additional tips on truck maintenance, and a special discount code.