my Tesla Model 3 Original (2017-2023) lights won't turn off what should I check

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

508 words

Problem Statement

Learn how to diagnose and fix the issue of lights not turning off in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in 'Park' and powered down before performing any inspections.

Symptoms

•Headlights remain illuminated even after the vehicle is turned off
•Interior lights do not turn off when doors are closed
•Battery drain due to lights staying on
•Warning message on the dashboard regarding lighting system
•Possible flickering of lights when attempting to turn them off

Diagnostic Steps

1
Check the vehicle settings in the touchscreen to ensure that the light settings are configured correctly.
2
Inspect the door sensors to verify they are functioning properly and closing correctly.
3
Use the Tesla mobile app to attempt to turn off the lights remotely.
4
Perform a soft reset of the vehicle by holding down both scroll wheels on the steering wheel.
5
Check for any software updates available for the vehicle that may resolve the issue.
6
Inspect the headlight relay and fuses for any signs of malfunction.

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

•None specifically required; however, a basic tool set may be needed for fuse replacement.

Parts Required

•Replacement fuses/relays (if found to be faulty)

Related Faults

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Diagnostic Steps

1
Check the vehicle settings in the touchscreen to ensure that the light settings are configured correctly.
2
Inspect the door sensors to verify they are functioning properly and closing correctly.
3
Use the Tesla mobile app to attempt to turn off the lights remotely.
4
Perform a soft reset of the vehicle by holding down both scroll wheels on the steering wheel.
5
Check for any software updates available for the vehicle that may resolve the issue.
6
Inspect the headlight relay and fuses for any signs of malfunction.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface.
Disconnect any external power sources if applicable (e.g., charging cable).

2. Verify Vehicle Settings

Navigate to the "Controls" menu on the touchscreen.
Go to "Lights" and ensure that the “Headlights” and “Interior Lights” settings are set to automatic or off as desired.

3. Inspect Door Sensors

Open each door and check for any obstructions around the door frame that might prevent the sensor from closing.
Close the doors firmly and check if the lights turn off.

4. Soft Reset Procedure

While in the vehicle, press and hold both scroll wheels on the steering wheel until the touchscreen reboots.
Wait for the Tesla logo to appear, then release the scroll wheels.

5. Check for Software Updates

Go to "Software" in the "Controls" menu.
If an update is available, follow the prompts to install it.

6. Inspect Headlight Relay/Fuses

Locate the front fuse box (usually under the hood).
Identify the headlight relay and fuses according to the owner’s manual.
Replace any blown fuses or faulty relays as necessary (ensure to use the correct amperage).