Kenworth T680 Mirror Assembly Replacement: Complete Video Tutorial

Kenworth T680 Mirror Assembly Replacement: Video Tutorial

Side mirrors on the Kenworth T680 are exposed to constant abuse — vibration, road debris, tight loading docks, and weather. When a mirror gets damaged, replacing the entire assembly is often more cost-effective than trying to repair individual components.

Mirror Types for Kenworth T680

• Manual mirrors: Basic reflective glass with manual adjustment
• Heated mirrors: Include heating element to prevent fog and ice buildup
• Power heated mirrors: Electric adjustment with heating — the most common OEM configuration
• Chrome mirrors: Chrome-finished housings for show trucks

Tools Required

• T30 and T40 Torx bits
• 13mm socket
• Trim removal tool (plastic)
• Wire strippers and butt connectors (if rewiring)
• Thread-locking compound (Blue Loctite)

Step 1: Remove the Door Panel Access (Interior)

From inside the cab, remove the door panel trim piece that covers the mirror mounting bolts. On the T680, this is typically held by 2-3 plastic clips and one T30 Torx screw. Use a plastic trim tool to avoid scratching the interior panels.

Step 2: Disconnect Wiring

Unplug the mirror wiring harness connector inside the door. For heated/power mirrors, there will be a multi-pin connector — press the release tab firmly before pulling. For manual mirrors, skip this step.

Step 3: Remove Mounting Bolts

The T680 mirror assembly is secured with 3 bolts (typically 13mm) accessible from inside the door. Support the mirror from outside while removing the last bolt — these assemblies weigh 8-12 lbs depending on configuration.

Step 4: Install New Mirror Assembly

Apply a small amount of Blue Loctite to the mounting bolt threads. Position the new mirror assembly and start all three bolts hand-tight. Torque to 25-30 ft-lbs in a star pattern. Connect the wiring harness — you should hear the connector click into place.

Step 5: Test and Adjust

Turn on the ignition and test all mirror functions: power adjustment (up/down/left/right), heated function (wait 2-3 minutes to feel warmth), and turn signal indicator if equipped. Adjust the mirror to your driving position.

Heated Mirror Not Working? Troubleshooting

• Check the fuse: Mirror heater fuse is typically in the cab fuse panel
• Test the connector: Use a multimeter to verify 12V at the mirror connector with ignition on
• Ground issue: Clean the grounding point inside the door
• Heating element: If you have power but no heat, the element in the glass is likely bad

Mirror Maintenance Tips

To extend mirror life: periodically check mounting bolt torque (vibration loosens them), clean mirror glass with ammonia-free glass cleaner, and inspect the rubber gasket between the mirror housing and door for water intrusion.

Find your mirrors: Shop Kenworth T680 mirrors at EverTrust — heated, power, and chrome options available with same-day shipping.