my Tesla Model S Plaid/Refresh (2021-present) rear lights are out what should I check

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

479 words

Problem Statement

Learn how to diagnose and fix rear lights not working on Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components to avoid shock.

Symptoms

•Rear lights are completely out
•Brake lights do not illuminate
•Turn signals are non-functional
•No warning or error messages displayed on the dashboard
•Reverse lights are not working

Diagnostic Steps

1
Check the vehicle settings to ensure the rear lights are not turned off or in a malfunction mode.
2
Inspect the rear light assembly for any signs of physical damage or moisture intrusion.
3
Use an OBD-II scanner to check for any error codes related to the lighting system.
4
Test the fuse related to the rear light circuit for continuity and visual damage.
5
Verify the wiring harness connected to the rear light assembly for any loose connections or frayed wires.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Fuse puller or pliers
•Screwdriver set
•Multimeter

Parts Required

•Replacement fuse
•New rear light assembly

Related Faults

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Diagnostic Steps

1
Check the vehicle settings to ensure the rear lights are not turned off or in a malfunction mode.
2
Inspect the rear light assembly for any signs of physical damage or moisture intrusion.
3
Use an OBD-II scanner to check for any error codes related to the lighting system.
4
Test the fuse related to the rear light circuit for continuity and visual damage.
5
Verify the wiring harness connected to the rear light assembly for any loose connections or frayed wires.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Disconnect the 12V battery to prevent electrical shock.

2. Inspect and Replace Fuse

Locate the fuse box, typically under the dashboard or in the trunk area.
Identify the fuse associated with the rear lights using the fuse diagram.
Remove the fuse using a fuse puller or pliers.
Inspect the fuse for continuity. If blown, replace it with a new fuse of the same amperage.

3. Check Wiring and Connections

Reconnect the battery temporarily.
Inspect the wiring harness connected to the rear lights for any damage.
Ensure all connectors are securely attached.
If any wires are damaged, repair or replace as needed.

4. Replace Rear Light Assembly (if necessary)

Remove any trim panels or covers to access the rear light assembly.
Unscrew and remove the light assembly from the vehicle.
Disconnect the wiring harness from the light assembly.
Connect the new rear light assembly and secure it in place.
Reinstall any trim panels or covers.