why does my Tesla Model S Original (2012-2020) dashboard lights flicker

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

497 words

Problem Statement

Learn how to diagnose and fix dashboard lights flickering in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the high-voltage battery before performing any electrical work.
•Allow the vehicle to cool down if it has been running before inspecting the electrical components.

Symptoms

•Dashboard lights flickering on and off
•Occasional dimming of interior lights
•Possible warning messages displayed on the screen
•Inconsistent operation of infotainment system
•Battery percentage fluctuating unexpectedly

Diagnostic Steps

1
Check for software updates through the vehicle's settings menu.
2
Inspect the 12V battery voltage using a multimeter to ensure it is within the normal range (12.6V - 12.8V when fully charged).
3
Use an OBD-II scanner to check for any stored error codes related to electrical systems.
4
Examine the wiring and connections behind the dashboard for any loose or damaged wires.
5
Review the vehicle’s logs for any recent events that might indicate a power supply issue.

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
•Screwdrivers
•Flashlight

Parts Required

•12V battery
•Electrical connectors

Related Faults

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Diagnostic Steps

1
Check for software updates through the vehicle's settings menu.
2
Inspect the 12V battery voltage using a multimeter to ensure it is within the normal range (12.6V - 12.8V when fully charged).
3
Use an OBD-II scanner to check for any stored error codes related to electrical systems.
4
Examine the wiring and connections behind the dashboard for any loose or damaged wires.
5
Review the vehicle’s logs for any recent events that might indicate a power supply issue.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, screwdrivers, and a flashlight.
Ensure the vehicle is parked on a flat surface with the ignition off.
Disconnect the high-voltage battery for safety before performing any electrical work.

2. Update Software

Connect to Wi-Fi and navigate to the 'Software' section in the vehicle's settings.
Check for available updates and follow prompts to install the latest software.

3. Inspect and Test the 12V Battery

Sub-step 1: Remove the front trunk (frunk) cover to access the 12V battery.
Sub-step 2: Use a multimeter to measure the voltage of the 12V battery.
- If voltage is below 12.4V, replace the battery.
Sub-step 3: If the battery is good, check the battery terminals for corrosion or loose connections.

4. Check Electrical Connections

Sub-step 1: Remove the dashboard panel using appropriate screwdrivers.
Sub-step 2: Visually inspect wiring harnesses and connectors for damage or signs of wear.
Sub-step 3: Secure any loose connections and repair any damaged wires as necessary.

5. Clear Error Codes

Sub-step 1: Connect the OBD-II scanner to the vehicle’s port.
Sub-step 2: Retrieve any fault codes and write them down.
Sub-step 3: Clear the codes and monitor if they return after completing the repairs.