why does my Tesla Model 3 Original (2017-2023) interior light stay on

Tesla Model 3 Highland (2024-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

473 words

Problem Statement

Learn how to diagnose and fix the issue of the interior light staying on in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Interior light stays on after the vehicle is turned off
•Battery drain due to prolonged light activation
•Possible warning message on the dashboard
•Inconsistent operation of other interior lights (e.g., map lights)
•Doors may not register as closed properly

Diagnostic Steps

1
Check if any doors are not completely closed or if there are issues with door seals.
2
Use the touchscreen to check the interior lighting settings and confirm if they are set to automatic.
3
Inspect the interior light switch for physical damage or malfunction.
4
Run a software update via the Tesla app to ensure the vehicle's software is up to date.
5
Scan for error codes using the onboard diagnostics to identify any lighting control module errors.

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

•Trim removal tool
•Multimeter
•Screwdrivers (Phillips and flathead)
•Torque wrench

Parts Required

•Door sensor (if faulty)
•Lighting control module (if faulty)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check if any doors are not completely closed or if there are issues with door seals.
2
Use the touchscreen to check the interior lighting settings and confirm if they are set to automatic.
3
Inspect the interior light switch for physical damage or malfunction.
4
Run a software update via the Tesla app to ensure the vehicle's software is up to date.
5
Scan for error codes using the onboard diagnostics to identify any lighting control module errors.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked and in a safe working environment.
Disconnect the 12V battery to avoid electrical shorts.

2. Inspect Door Sensors

Locate the door sensors on each door.
Remove the door panel if necessary (using a trim removal tool).
Ensure the sensors are clean and functioning; test with a multimeter if possible.
If faulty, replace the door sensor with a new one.

3. Check Lighting Control Module

Access the lighting control module located within the vehicle's central console.
Inspect the wiring harness for loose connections or damage.
If the module is faulty, replace it with a new module as per manufacturer specifications.

4. Reset Interior Light Settings

Reconnect the 12V battery.
Use the touchscreen to reset the interior light settings:
- Go to ‘Controls’ → ‘Lights’ → ‘Interior Lights’ and toggle settings.
Test the interior lights to ensure they operate correctly.