how to fix my Tesla Model S Original (2012-2020) when the dashboard lights won't turn on?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

545 words

Problem Statement

Learn how to diagnose and fix dashboard lights not turning 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

•Disconnect the battery before working on electrical systems to avoid shock or short circuits.
•Ensure the vehicle is in park and turned off during repairs.

Symptoms

•Dashboard lights completely off
•Instrument cluster not displaying information
•Warning lights not illuminating
•No response from vehicle controls that depend on dashboard visibility
•Ambient lighting issues affecting overall interior visibility

Diagnostic Steps

1
Check the vehicle's settings to ensure dashboard lights are not set to 'off' or 'dimmed.'
2
Inspect the vehicle's main battery level to ensure it is not critically low.
3
Perform a soft reset of the vehicle by holding down the steering wheel buttons until the touchscreen resets.
4
Use an OBD-II scanner to check for any fault codes related to the dashboard or instrument cluster.
5
Verify the vehicle's software version and check for any available updates.
6
Inspect the wiring harness and connectors behind the dashboard for any visible damage or disconnections.

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
•Soft cloth
•Plastic trim tool

Parts Required

•Replacement battery (if testing reveals a critical low voltage)
•Replacement wiring harness (if any damage is found)

Related Faults

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Diagnostic Steps

1
Check the vehicle's settings to ensure dashboard lights are not set to 'off' or 'dimmed.'
2
Inspect the vehicle's main battery level to ensure it is not critically low.
3
Perform a soft reset of the vehicle by holding down the steering wheel buttons until the touchscreen resets.
4
Use an OBD-II scanner to check for any fault codes related to the dashboard or instrument cluster.
5
Verify the vehicle's software version and check for any available updates.
6
Inspect the wiring harness and connectors behind the dashboard for any visible damage or disconnections.

Solution

1. Preparation

Gather necessary tools: OBD-II scanner, multi-tool, and soft cloth.
Ensure the vehicle is parked in a safe area and turned off.

2. Battery Check

Sub-steps:
- Open the front trunk and locate the main battery.
- Use a multimeter to check the voltage of the battery; it should typically read above 12.4 volts.
- If the battery is low, proceed to charge or replace it as necessary.

3. Software Reset

Sub-steps:
- Sit in the driver's seat and ensure all doors are closed.
- Press and hold both scroll wheels on the steering wheel simultaneously.
- Keep holding the buttons until the touchscreen goes black and the Tesla logo appears.
- Release the buttons and wait for the system to reboot.

4. Software Update

Sub-steps:
- Navigate to "Software" on the touchscreen.
- Check for any available updates and follow the on-screen instructions to install them.
- Restart the vehicle after the update is complete.

5. Inspect Wiring

Sub-steps:
- Remove the dashboard cover using a plastic trim tool.
- Inspect all visible wiring and connectors for damage or loose connections.
- Reconnect any loose plugs and repair any damaged wires as necessary.
- Reassemble the dashboard cover securely.