how to resolve the issue of the interior lights staying on in Tesla Model 3 Original (2017-2023)

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

536 words

Problem Statement

Learn how to resolve the issue of interior lights staying on in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic 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 shocks or shorts.

Symptoms

•Interior lights remain illuminated when the vehicle is off
•Door ajar warning displayed on the screen
•Battery drain observed over time
•Lights do not turn off after closing doors
•Possible alerts in the vehicle's software indicating a fault

Diagnostic Steps

1
Check for any door or trunk that may not be fully closed.
2
Use the Tesla mobile app or vehicle touchscreen to check the status of all doors and trunk.
3
Inspect the door sensors for any visible damage or obstruction.
4
Scan the vehicle for diagnostic trouble codes (DTCs) using Tesla service tools.
5
Review vehicle settings to ensure that interior light settings are configured correctly.
6
Perform a soft reset of the vehicle's software by holding down the scroll wheels on the steering wheel.

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

•Multimeter
•Torx screwdriver set
•Trim removal tools

Parts Required

•Replacement door sensors (if faulty)
•Door or trunk seals (if damaged)

Related Faults

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Diagnostic Steps

1
Check for any door or trunk that may not be fully closed.
2
Use the Tesla mobile app or vehicle touchscreen to check the status of all doors and trunk.
3
Inspect the door sensors for any visible damage or obstruction.
4
Scan the vehicle for diagnostic trouble codes (DTCs) using Tesla service tools.
5
Review vehicle settings to ensure that interior light settings are configured correctly.
6
Perform a soft reset of the vehicle's software by holding down the scroll wheels on the steering wheel.

Solution

1. Preparation

Ensure the vehicle is parked in a safe location.
Disconnect the 12V battery to prevent any electrical shorts (if applicable).
Gather necessary tools.

2. Inspect Door and Trunk Seals

Sub-steps:
- Examine the door seals and trunk seals for any wear, dirt, or damage.
- Clean the seals with a damp cloth to ensure proper contact.
- If damaged, replace the seals as needed.

3. Check Door Sensors

Sub-steps:
- Remove the door panel (if necessary) to access the door sensor.
- Inspect the wiring connected to the door sensor for any signs of damage.
- Test the door sensor with a multimeter to ensure it is functioning correctly.
- Replace the door sensor if it is found to be faulty.

4. Reset Interior Light Settings

Sub-steps:
- Access the vehicle’s settings from the touchscreen.
- Navigate to "Lights" settings and confirm that the interior light settings are set to the desired mode.
- Adjust settings if necessary and save changes.

5. Reconnect Battery and Test

Sub-steps:
- Reconnect the 12V battery.
- Close all doors and wait for a few minutes to see if the lights turn off automatically.
- Test the door and trunk closures to ensure proper function.