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

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

544 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

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always ensure the vehicle is powered off before working on electrical components.

Symptoms

•Interior lights stay on when doors are closed
•Battery drain symptoms (e.g., reduced driving range)
•Dome light flickers intermittently
•Notifications or alerts on the touchscreen regarding battery issues
•Difficulty in using the key fob or app due to battery depletion

Diagnostic Steps

1
Inspect all door switches for proper operation and ensure they are not stuck or damaged.
2
Check the vehicle's settings via the touchscreen to confirm interior light settings are correctly configured.
3
Scan for error codes using an OBD-II scanner to identify any electrical system issues.
4
Perform a visual inspection of the wiring harnesses related to the interior lighting and door sensors for shorts or damage.
5
Test the functionality of the manual override switch for the interior lights, if applicable.

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
•Screwdriver set
•Flashlight

Parts Required

•Door switches (if any are found faulty)
•Manual override switch (if found faulty)

Related Faults

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Diagnostic Steps

1
Inspect all door switches for proper operation and ensure they are not stuck or damaged.
2
Check the vehicle's settings via the touchscreen to confirm interior light settings are correctly configured.
3
Scan for error codes using an OBD-II scanner to identify any electrical system issues.
4
Perform a visual inspection of the wiring harnesses related to the interior lighting and door sensors for shorts or damage.
5
Test the functionality of the manual override switch for the interior lights, if applicable.

Solution

1. Preparation

Tools Required:
- Multimeter
- Screwdriver set
- Flashlight
Ensure the vehicle is in a safe state, parked, and the power is off.

2. Inspect Door Switches

Sub-steps:
1. Locate the door switches; they are typically found on the door latch mechanism.
2. Use a multimeter to test each switch for continuity when the door is closed.
3. If a switch is faulty, proceed to replace it by removing the door panel if necessary.

3. Check and Adjust Interior Light Settings

Sub-steps:
1. Turn on the vehicle and access the touchscreen.
2. Navigate to the 'Controls' menu and select 'Lights'.
3. Verify that the interior light settings are set to 'Auto' or as desired. Adjust any settings that are incorrect.

4. Inspect Wiring and Connections

Sub-steps:
1. Inspect the wiring harness connected to the door switches and interior lights for any visible wear or damage.
2. Repair or replace any damaged wires or connectors found during inspection.
3. Ensure all connections are tight and free of corrosion.

5. Test the Manual Override Switch

Sub-steps:
1. Locate the manual override switch for the interior lights, typically near the dome light.
2. Test the switch by toggling it to see if it resolves the issue.
3. If the switch is faulty, replace it using a screwdriver to remove the fixture.