how to fix the interior lights staying on in my Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

557 words

Problem Statement

Learn how to diagnose and fix interior lights staying on in Tesla Model S (2012-2020). 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 battery before working on electrical components to avoid shorts and shocks

Symptoms

•Interior lights do not turn off after closing doors
•Dome lights remain illuminated even when the vehicle is parked
•Battery drain may be noted due to prolonged light usage
•Possible 'Interior Light' warning message on the dashboard display
•Doors may not register as closed properly

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for electrical faults
2
Inspect door switches for proper operation and ensure they are not stuck or malfunctioning
3
Verify settings in the vehicle's control menu to ensure interior lights are set to automatic
4
Check the vehicle's battery management system for any faults that may affect power draw
5
Inspect the wiring harnesses connected to the door switches and interior lights for any signs of damage or corrosion

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
•Screwdriver set
•Multimeter
•Electrical tape

Parts Required

•Replacement door switches (if faulty)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for electrical faults
2
Inspect door switches for proper operation and ensure they are not stuck or malfunctioning
3
Verify settings in the vehicle's control menu to ensure interior lights are set to automatic
4
Check the vehicle's battery management system for any faults that may affect power draw
5
Inspect the wiring harnesses connected to the door switches and interior lights for any signs of damage or corrosion

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the vehicle's 12V battery to prevent electrical shorts.

2. Inspect and Replace Door Switches

Tools Required: Screwdriver set, multimeter, replacement door switches (if necessary).
Use a screwdriver to remove the door panel covering the switch.
Disconnect the electrical connector from the door switch.
Test the switch with a multimeter to check for continuity. If it does not show continuity when pressed, replace the switch.
Reconnect the new or tested switch and reassemble the door panel securely.

3. Adjust Interior Light Settings

Tools Required: Tesla mobile app or vehicle touchscreen.
Access the vehicle settings from the touchscreen.
Navigate to "Lights" settings and confirm the interior lights are set to "Auto."
If adjustments are made, monitor the lights to ensure they turn off after closing the doors.

4. Inspect Wiring and Connectors

Tools Required: Wiring harness connectors, electrical tape.
Visually inspect wiring connected to the interior lights for any frayed wires or loose connections.
Ensure all connectors are seated properly. Repair any damaged wires using electrical tape or replace as necessary.

5. Reconnect Battery and Test

Reconnect the 12V battery.
Close all doors and check if the interior lights turn off as expected after a few minutes.
Perform a test drive to ensure all systems are functioning properly.