FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
my Tesla Model 3 Original (2017-2023) headlights flicker while driving what does it mean - Tesla Model 3
Home/Cars/Tesla/Model 3/Highland (2024-present)/my Tesla Model 3 Original (2017-2023) headlights flicker while driving what does it mean

my Tesla Model 3 Original (2017-2023) headlights flicker while driving what does it mean

Tesla Model 3 Highland (2024-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
628 words

Problem Statement

Learn how to diagnose and fix flickering headlights in Tesla Model 3 (2017-2023). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component
Electrical
Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems to prevent shocks or shorts.
  • •Allow the engine to cool before inspecting electrical components.

Symptoms

  • •Headlight flickering during operation
  • •Possible dashboard warning lights illuminated
  • •Dimming of dashboard lights when headlights flicker
  • •Intermittent loss of low or high beam functionality
  • •Increase in battery drain or electrical system load

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

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
  • •Screwdriver set
  • •Fuse puller

Parts Required

  • •Headlight bulbs (OEM-spec)
  • •Fuses (as needed)
  • •Headlight switch (if faulty)

Additional Information

Affected Component
Electrical
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
5 items
Parts Required
3 items

Related Faults

Loading...

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation
Solution
1. Preparation
  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a flat surface with the engine off and cooled down.
  • Disconnect the negative battery terminal to prevent electrical shorts.
2. Inspect and Replace Bulbs
  • Remove the headlight assembly:
    • Open the hood and locate the headlight assembly.
    • Remove any retaining screws or clips securing the assembly.
    • Gently pull out the assembly from the vehicle.
  • Inspect the bulbs:
    • Check both low and high beam bulbs for signs of damage or wear.
    • Replace any faulty bulbs with OEM-spec replacements.
  • Reinstall the headlight assembly:
    • Position the assembly back into its housing and secure with screws or clips.
3. Check and Replace Fuses
  • Locate the fuse box:
    • Refer to the owner’s manual for the exact location of the headlight fuses.
  • Remove the relevant fuses:
    • Use a fuse puller to extract the fuses associated with the headlights.
  • Inspect for continuity:
    • Check each fuse with a multimeter; replace any blown fuses with the correct amperage rating.
4. Inspect Wiring and Connectors
  • Check wiring harnesses:
    • Inspect all wiring connected to the headlight assembly for fraying or corrosion.
  • Clean and secure connections:
    • Use electrical cleaner to clean any corroded connectors and ensure they are tightly connected.
5. Test Electrical Supply
  • Check battery voltage:
    • Use a multimeter to measure the battery voltage with the engine off (should be around 12.6V).
  • Test alternator output:
    • Start the car and check the voltage at the battery (should be between 13.7V and 14.7V).
    • If the voltage is too low, the alternator may need servicing.
6. Verify Headlight Switch and Relay
  • Inspect the headlight switch:
    • Remove the switch from the dashboard and test for continuity with a multimeter.
  • Replace if faulty:
    • If the switch is defective, replace it with an OEM part.
  • Test the relay:
    • Swap the headlight relay with a similar relay in the fuse box to see if the issue persists.