how to fix the headlight issue on Tesla Model 3 Original (2017-2023)

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

521 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks.

Symptoms

•One or both headlights are completely out.
•Headlights flicker or blink intermittently.
•Headlights are dimmer than usual.
•Error message regarding headlights is displayed on the dashboard.
•Headlight adjustment is not functioning properly.

Diagnostic Steps

1
Check the vehicle’s settings to ensure headlights are set to 'Auto' mode.
2
Inspect the headlight bulbs for any visible damage or burn-out.
3
Use an OBD-II scanner to check for any related error codes.
4
Verify the headlight fuses by consulting the fuse box diagram and inspecting the relevant fuses.
5
Check the connectors and wiring for corrosion or loose connections.
6
Test the headlight switch for functionality.

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

•Multimeter
•OBD-II scanner
•Fuse puller
•Basic socket set

Parts Required

•Headlight bulbs
•Fuses (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the vehicle’s settings to ensure headlights are set to 'Auto' mode.
2
Inspect the headlight bulbs for any visible damage or burn-out.
3
Use an OBD-II scanner to check for any related error codes.
4
Verify the headlight fuses by consulting the fuse box diagram and inspecting the relevant fuses.
5
Check the connectors and wiring for corrosion or loose connections.
6
Test the headlight switch for functionality.

Solution

1. Preparation

Gather tools and parts: headlight bulbs (if needed), multimeter, OBD-II scanner.
Ensure the vehicle is parked on a level surface and turned off.
Disconnect the 12V battery to ensure safety while working on electrical components.

2. Replace Headlight Bulbs

Sub-steps:
1. Open the front trunk and locate the headlight assembly.
2. Remove the headlight assembly cover by twisting it counterclockwise.
3. Disconnect the electrical connector from the bulb by pressing the release tab and pulling it out.
4. Remove the old bulb by twisting it counterclockwise and pulling it out.
5. Insert the new bulb into the assembly, twisting it clockwise to secure.
6. Reconnect the electrical connector and replace the headlight assembly cover.

3. Inspect and Replace Fuses

Sub-steps:
1. Locate the fuse box according to the owner’s manual.
2. Identify the headlight fuses and remove them using a fuse puller.
3. Inspect the fuses for continuity using a multimeter.
4. Replace any blown fuses with fuses of the same amperage rating.
5. Reinstall the fuse cover securely.

4. Check Wiring and Connectors

Sub-steps:
1. Visually inspect the wiring harness leading to the headlights for signs of wear, fraying, or corrosion.
2. If corrosion is found, clean the connectors with electrical contact cleaner.
3. Ensure all connections are secure. If any connectors are loose, reseat them properly.

5. Test Headlight Functionality

Sub-steps:
1. Reconnect the 12V battery.
2. Turn on the vehicle and activate the headlights.
3. Verify that both headlights are functioning correctly.