my Tesla Model 3 Original (2017-2023) interior lights stay on what's wrong

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

478 words

Problem Statement

Learn how to diagnose and fix the issue of interior lights staying on in Tesla Model 3 (2017-2023). Step-by-step guide with symptoms and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle's battery before working on electrical systems to prevent short circuits.

Symptoms

•Interior lights stay on continuously
•Battery drain occurs when the vehicle is off
•Dome light switch appears unresponsive
•Dashboard displays error messages related to lighting
•Ambient lighting remains active despite vehicle being locked

Diagnostic Steps

1
Check the vehicle settings for interior light settings in the touchscreen menu.
2
Inspect the door switches for proper function by manually testing each door and observing light behavior.
3
Use an OBD-II scanner to check for any related error codes in the vehicle's computer system.
4
Verify the state of the interior light switch; ensure it is not set to the 'On' position.
5
Inspect the wiring and connectors leading to the interior light fixtures 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
•Multimeter
•Screwdriver set

Parts Required

•Door switch (if faulty)
•Wiring harness (if damaged)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the vehicle settings for interior light settings in the touchscreen menu.
2
Inspect the door switches for proper function by manually testing each door and observing light behavior.
3
Use an OBD-II scanner to check for any related error codes in the vehicle's computer system.
4
Verify the state of the interior light switch; ensure it is not set to the 'On' position.
5
Inspect the wiring and connectors leading to the interior light fixtures for any signs of damage or corrosion.

Solution

1. Preparation

Gather necessary tools: OBD-II scanner, multimeter, screwdriver set, and possibly a wiring harness repair kit.
Ensure the vehicle is parked in a safe location and the ignition is off.

2. Adjust Settings

Navigate to the touchscreen settings menu:
- Select "Controls" > "Lighting."
- Check that interior lights are set to "Auto" or "Off" and not manually set to "On."

3. Inspect Door Switches

Open each door and locate the door switch:
- Use a multimeter to test the switch for continuity when pressed.
- If a switch is faulty, remove it by unscrewing or unclipping it and replace it with a new switch.

4. Check Wiring and Connectors

Remove the interior light covers using a screwdriver:
- Inspect the wiring and connectors for any fraying, corrosion, or loose connections.
- Repair or replace any damaged wiring as necessary.

5. Clear Error Codes

Connect the OBD-II scanner to the vehicle’s diagnostic port:
- Scan for error codes related to interior lighting.
- Clear any codes found and monitor if they return after performing other repairs.