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 bit of know-how, you can save significant money on mechanic fees. Understanding the basics of what you need to know about truck mirrors, including how they are mounted and adjusted, will make the job much smoother. 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 damage to the mirror.

• Disconnect the two wires connected to the heating element of the mirror. Maintaining these connections helps prevent minor electrical issues similar to those seen in Freightliner lighting and control faults.

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 a 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. Keeping the cab comfortable can also make daily driving easier, especially when handling tasks similar to Freightliner seat replacement work.

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. Some trucks may display alerts associated with basic electrical disruptions, including signals related to Freightliner air system warnings.

Replacing a side mirror on your semi-truck is a straightforward task that can be accomplished 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. Many drivers also appreciate the better visibility and durability offered by Velvac mirror upgrades, especially for long-distance driving.

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.