why does my Tesla Model S Plaid/Refresh (2021-present) dashboard lights flicker

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

485 words

Problem Statement

Learn how to diagnose and fix dashboard lights flickering in Tesla Model S Plaid. 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

•Ensure the vehicle is in park during updates.
•Disconnect the main battery if working on electrical components, and wear gloves.
•Ensure all passengers are safely seated before performing the reset.
•Disconnect the vehicle's main power to avoid electric shock.

Symptoms

•Dashboard lights flicker intermittently
•Screen display may freeze or lag
•Possible loss of auxiliary power features (like lights or central console)
•Warning messages may appear briefly
•Audio system may cut in and out

Diagnostic Steps

1
Check for software updates via the Tesla interface.
2
Inspect the vehicle's 12V battery for voltage and connections.
3
Use the Tesla app or touchscreen to check for any error messages.
4
Perform a hard reset of the touchscreen by holding down the scroll wheels on the steering wheel.
5
Inspect wiring harnesses and connectors for signs of wear or damage.

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
•Socket set
•Trim removal tools

Parts Required

•New 12V battery (if necessary)

Related Faults

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Diagnostic Steps

1
Check for software updates via the Tesla interface.
2
Inspect the vehicle's 12V battery for voltage and connections.
3
Use the Tesla app or touchscreen to check for any error messages.
4
Perform a hard reset of the touchscreen by holding down the scroll wheels on the steering wheel.
5
Inspect wiring harnesses and connectors for signs of wear or damage.

Solution

1. Software Update

Sub-steps:
- Navigate to the "Software" tab on the Tesla interface.
- Check for any available updates and install them.
Tools Required: None
Safety Warnings: Ensure the vehicle is in park during updates.

2. Inspect and Replace 12V Battery

Sub-steps:
- Open the front trunk (frunk) and locate the 12V battery.
- Use a multimeter to check voltage; it should be around 12.6V when fully charged.
- If voltage is low, disconnect the battery by removing the negative terminal first, followed by the positive.
- Replace with a new 12V battery (ensure it matches specifications).
- Reconnect terminals (positive first, then negative).
Tools Required: Multimeter, socket set
Safety Warnings: Disconnect the main battery if working on electrical components, and wear gloves.

3. Hard Reset of Touchscreen

Sub-steps:
- With the vehicle in park, press and hold both scroll wheels on the steering wheel simultaneously for 10 seconds until the screen resets.
Tools Required: None
Safety Warnings: Ensure all passengers are safely seated before performing the reset.

4. Wiring Inspection

Sub-steps:
- Visually inspect the wiring harnesses connected to the dashboard and touchscreen.
- Look for frayed wires or loose connectors.
- If damage is found, repair or replace the affected harnesses.
Tools Required: Socket set, trim removal tools
Safety Warnings: Disconnect the vehicle's main power to avoid electric shock.