my Tesla Model S Original (2012-2020) dashboard lights are flickering what's wrong

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

455 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 shocks or shorts.

Symptoms

•Dashboard lights flickering intermittently
•Possible dimming of headlights
•Erratic behavior of infotainment system
•Warning messages displayed on the screen
•Battery warning light illuminated

Diagnostic Steps

1
Scan the vehicle's computer using a compatible OBD-II scanner to check for stored error codes.
2
Inspect the 12V battery voltage and connections for any signs of corrosion or looseness.
3
Check the firmware version and update if necessary through the Tesla service menu.
4
Verify the condition of the main electrical wiring harness for fraying or damage.
5
Examine the fuses related to the dashboard and lighting systems for any blown fuses.

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
•Socket set
•Basic hand tools

Parts Required

•12V battery (if replacement is needed)
•Fuses (if any are blown)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's computer using a compatible OBD-II scanner to check for stored error codes.
2
Inspect the 12V battery voltage and connections for any signs of corrosion or looseness.
3
Check the firmware version and update if necessary through the Tesla service menu.
4
Verify the condition of the main electrical wiring harness for fraying or damage.
5
Examine the fuses related to the dashboard and lighting systems for any blown fuses.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, and basic hand tools.
Ensure the vehicle is parked on a level surface and the ignition is off.

2. Inspect and Test 12V Battery

Sub-step 1: Locate the 12V battery in the front trunk (frunk).
Sub-step 2: Use a multimeter to measure the battery voltage. It should be between 12.4V and 12.6V for a healthy battery.
Sub-step 3: If the voltage is low, recharge or replace the 12V battery.
Sub-step 4: Check battery connections for corrosion or looseness and clean or tighten as needed.

3. Update Firmware

Sub-step 1: Access the vehicle's settings through the touchscreen display.
Sub-step 2: Check for any available software updates and follow the prompts to install them if necessary.

4. Inspect Wiring and Fuses

Sub-step 1: Remove the fuse box cover and visually inspect all fuses related to the dashboard and lighting systems.
Sub-step 2: Replace any blown fuses with the same amperage rating.
Sub-step 3: Inspect the wiring harness for any visible damage or fraying, and repair or replace as necessary.