my Tesla Model Y exterior lights don't turn on, what do I do

Tesla Model Y Current (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

561 words

Problem Statement

Learn how to diagnose and fix exterior lights not turning on in Tesla Model Y. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components to prevent shock or short circuits.

Symptoms

•Exterior lights (headlights, taillights, turn signals) do not illuminate
•Dashboard light indicators for lights may be illuminated or not functioning
•No clicking sounds from relays when attempting to activate lights
•Possible error messages displayed on the vehicle screen regarding lighting systems
•Interior lights may also be affected (if related)

Diagnostic Steps

1
Check the vehicle settings via the touchscreen to ensure exterior lights are not turned off.
2
Inspect the exterior light bulbs for any signs of damage or burnout.
3
Use an OBD-II scanner to check for any fault codes related to the lighting system.
4
Inspect the fuses related to the lighting circuit for any blown fuses.
5
Test the light switch functionality for proper operation.
6
Verify the battery voltage to ensure it is within the normal range (12.4V-12.7V for a healthy battery).

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
•Trim removal tools

Parts Required

•Replacement light bulbs (as needed)
•Replacement fuses (if applicable)
•Replacement light switch (if faulty)

Related Faults

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Symptoms

•Exterior lights (headlights, taillights, turn signals) do not illuminate

•Dashboard light indicators for lights may be illuminated or not functioning

•No clicking sounds from relays when attempting to activate lights

•Possible error messages displayed on the vehicle screen regarding lighting systems

•Interior lights may also be affected (if related)

Diagnostic Steps

1
Check the vehicle settings via the touchscreen to ensure exterior lights are not turned off.
2
Inspect the exterior light bulbs for any signs of damage or burnout.
3
Use an OBD-II scanner to check for any fault codes related to the lighting system.
4
Inspect the fuses related to the lighting circuit for any blown fuses.
5
Test the light switch functionality for proper operation.
6
Verify the battery voltage to ensure it is within the normal range (12.4V-12.7V for a healthy battery).

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a well-lit area.
Disconnect the vehicle's 12V battery to avoid electrical shock.

2. Inspect and Replace Bulbs

Sub-steps:
1. Access the bulb housing for headlights, taillights, or turn signals.
2. Remove the bulb by twisting counterclockwise or following specific manufacturer instructions.
3. Inspect the bulb for a broken filament or blackened glass.
4. Replace with a new bulb of the same type (ensure compatibility with Tesla Model Y).
5. Reassemble the housing and reconnect any connectors.

3. Check and Replace Fuses

Sub-steps:
1. Locate the fuse box (typically under the dashboard or in the trunk area).
2. Identify the fuse for the exterior lights using the fuse diagram.
3. Remove the fuse using a fuse puller or pliers.
4. Inspect the fuse for continuity; if blown, replace it with a new fuse of the same amperage.
5. Reinsert the fuse and ensure it is seated correctly.

4. Replace Light Switch (if necessary)

Sub-steps:
1. Remove any trim panels surrounding the light switch.
2. Disconnect the wiring harness from the back of the switch.
3. Unbolt or unclip the switch from its housing.
4. Install the new switch by securing it in place and reconnecting the wiring harness.
5. Reassemble the trim panels.

5. Reconnect Battery

Reconnect the 12V battery and ensure all connections are secure.