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

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

538 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

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical systems to avoid electric shock.
•Allow the vehicle to cool down before inspecting electrical components.

Symptoms

•Dashboard lights flickering intermittently
•Instrument cluster display dimming or brightening
•Possible loss of power to other electrical components
•Warning messages on the display
•Rapid cycling of warning lights

Diagnostic Steps

1
Check the vehicle's software version to ensure it is up-to-date.
2
Inspect the 12V battery voltage using a multimeter; it should be between 12.4V and 12.7V when the vehicle is off.
3
Scan the vehicle's onboard diagnostics using a Tesla-compatible OBD-II scanner to identify any error codes.
4
Inspect the battery management system (BMS) for any fault codes or abnormal readings.
5
Examine the connections at the 12V battery for corrosion or looseness.
6
Check for any software updates or recalls related to the dashboard and 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

•Socket set
•Multimeter
•Tesla-compatible OBD-II scanner
•Electrical cleaner

Parts Required

•New 12V battery
•Replacement fuses

Related Faults

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Diagnostic Steps

1
Check the vehicle's software version to ensure it is up-to-date.
2
Inspect the 12V battery voltage using a multimeter; it should be between 12.4V and 12.7V when the vehicle is off.
3
Scan the vehicle's onboard diagnostics using a Tesla-compatible OBD-II scanner to identify any error codes.
4
Inspect the battery management system (BMS) for any fault codes or abnormal readings.
5
Examine the connections at the 12V battery for corrosion or looseness.
6
Check for any software updates or recalls related to the dashboard and electrical systems.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and secured.
Disconnect the 12V battery to avoid electrical shock.

2. Inspect and Replace 12V Battery

Tools Required: Socket set, multimeter, wrenches
Sub-steps:
1. Locate the 12V battery, usually found in the front trunk (frunk).
2. Use a multimeter to measure the battery voltage. If it is below 12.4V, consider replacing it.
3. Disconnect the negative terminal first, followed by the positive terminal.
4. Remove the battery hold-down brackets and lift the battery out.
5. Install the new battery by reversing the disconnection steps.
6. Reconnect the positive terminal first, followed by the negative terminal.

3. Update Software

Tools Required: Tesla account, Wi-Fi connection
Sub-steps:
1. Connect the vehicle to Wi-Fi.
2. Go to the software updates section on the touchscreen.
3. Install any available updates and follow on-screen prompts.
4. Restart the vehicle after installation is complete.

4. Check Electrical Connections

Tools Required: Socket set, flashlight
Sub-steps:
1. Inspect all fuses and relays related to the dashboard and electrical systems.
2. Replace any blown fuses with the same amperage rating.
3. Clean any corroded connections with electrical cleaner and reconnect.