How to Install Model Y Juniper Rear Diffuser Tail Lights: Complete Step-by-Step Guide

Introduction

Upgrading your Tesla Model Y with Juniper rear diffuser tail lights can dramatically enhance its appearance and visibility. This comprehensive guide will walk you through the complete installation process step by step.

What You'll Need

• Model Y Juniper rear diffuser tail light kit
• Phillips head screwdriver
• Plastic trim removal tools
• Microfiber cloth
• Electrical tape (optional)
• Gloves to protect the lights from fingerprints

Safety Precautions

Before beginning the installation:

• Park your vehicle on a level surface
• Turn off the vehicle completely
• Disconnect the 12V battery (recommended for safety)
• Allow lights to cool if recently used

Step-by-Step Installation Guide

Step 1: Remove the cover from the trailer hitch.

Step 2: This step is just to route the cigarette lighter wire through here.

Step 3: Remove the waterproof seal strip.

Step 4: This step is to (the yellow wire in the image is not the original vehicle wire—any wire will do) pull the navigation light wire back up.

Step 5: Tie a knot. The yellow one is called the auxiliary rope.

Step 6: Thread the line through.

Step 7: Cigarette lighter wiring (must be disassembled)

Step 8: Remember to route the cigarette lighter wiring out to this location first.

Step 9: The wires for the cigarette lighter and the diffuser lamp (for connection) only need to be connected to the red and green wires; the yellow wire is not required.

Step 10: Reinstall the waterproof strip

Step 11: Plug in the cigarette lighter and check if the light stays on.

Step 12: Replace the trailer hitch cover - Begin installing the rear diffuser

Before fully installing, reconnect the 12V battery and test all light functions:

• Running lights
• Brake lights
• Turn signals
• Reverse lights

Troubleshooting Tips

• Lights not working: Check wiring harness connection and ensure it's fully seated
• Flickering lights: Verify all connections are clean and secure
• Poor fitment: Ensure mounting bolts are properly aligned before tightening
• Error messages: Some vehicles may require coding; consult a professional if needed

Maintenance Tips

To keep your new Juniper tail lights looking great:

• Clean regularly with automotive glass cleaner
• Avoid harsh chemicals or abrasive materials
• Inspect seals periodically for moisture intrusion
• Check mounting bolts annually for tightness

Conclusion

Installing Model Y Juniper rear diffuser tail lights is a straightforward upgrade that can be completed in about 30-45 minutes per side. The enhanced styling and improved visibility make this a worthwhile modification for any Model Y owner. If you're not comfortable with the installation process, always consult a professional automotive technician.