my Tesla Model S Original (2012-2020) dashboard lights are flickering

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

555 words

Problem Statement

Learn how to diagnose and fix flickering dashboard lights 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 12V battery before working on electrical systems to prevent shocks or shorts

Symptoms

•Dashboard lights flicker on and off
•Possible dimming of lights when flickering occurs
•Occasional loss of power to other electrical components
•Warning messages may appear on the display
•Battery charge level may not display accurately

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner or Tesla diagnostics tool
2
Inspect the vehicle’s 12V battery and connections for corrosion or looseness
3
Check the software version and ensure it is up to date via the Tesla app or vehicle settings
4
Test the vehicle’s main battery voltage using a multimeter to ensure it is within the normal range
5
Inspect wiring harnesses and connections in the dashboard area for any damage or loose connections
6
Review the vehicle’s history for any recent repairs or incidents that might have affected electrical systems

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 or Tesla diagnostics tool
•Multimeter
•Socket set
•Visual inspection tools
•Flashlight

Parts Required

•New 12V battery (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner or Tesla diagnostics tool
2
Inspect the vehicle’s 12V battery and connections for corrosion or looseness
3
Check the software version and ensure it is up to date via the Tesla app or vehicle settings
4
Test the vehicle’s main battery voltage using a multimeter to ensure it is within the normal range
5
Inspect wiring harnesses and connections in the dashboard area for any damage or loose connections
6
Review the vehicle’s history for any recent repairs or incidents that might have affected electrical systems

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the 12V battery to ensure safety while working on electrical components.
Ensure the vehicle is parked in a safe area.

2. Inspect and Replace 12V Battery (if necessary)

Tools Required: Socket set, multimeter
Sub-steps:
1. Locate the 12V battery in the front trunk (frunk) area.
2. Use a multimeter to measure the voltage of the 12V battery. It should read between 12.4V to 12.8V when fully charged.
3. If the battery is below this range, proceed to remove it:
  - Disconnect the negative terminal first, followed by the positive terminal.
  - Remove any securing brackets and lift the battery out carefully.
4. Install the new 12V battery by reversing the removal steps, ensuring terminals are tightened securely.

3. Update Software

Tools Required: Tesla app or vehicle touchscreen
Sub-steps:
1. Connect the vehicle to Wi-Fi.
2. Access the software update section through the vehicle’s settings.
3. Follow prompts to check for and install any available software updates.

4. Inspect Wiring and Connections

Tools Required: Visual inspection tools, possibly a flashlight
Sub-steps:
1. Carefully examine the wiring harnesses behind the dashboard for any signs of wear, fraying, or disconnection.
2. Ensure all connectors are seated properly and there are no loose wires.
3. If any damaged wires are found, repair or replace as necessary.