how to fix the headlights on my Tesla Model S Original (2012-2020) not working

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

513 words

Problem Statement

Learn how to diagnose and fix headlights not working on Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical components to avoid shock.
•Handle bulbs carefully to prevent breakage and ensure proper installation.

Symptoms

•Headlights do not illuminate at all
•Flickering or intermittent operation of headlights
•Error message on the dashboard regarding headlights
•Low beam or high beam only functioning intermittently
•Headlight adjustment not responding

Diagnostic Steps

1
Inspect the headlight switch for damage or wear.
2
Check the vehicle's battery voltage to ensure it is fully charged.
3
Scan the vehicle's computer for any error codes related to the lighting system using an OBD-II scanner.
4
Inspect the headlight bulbs for signs of burn-out or damage.
5
Verify the headlight fuses in the fuse box for continuity.
6
Check wiring and connectors for corrosion or loose connections.

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
•Flashlight

Parts Required

•Headlight bulbs (as needed)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Inspect the headlight switch for damage or wear.
2
Check the vehicle's battery voltage to ensure it is fully charged.
3
Scan the vehicle's computer for any error codes related to the lighting system using an OBD-II scanner.
4
Inspect the headlight bulbs for signs of burn-out or damage.
5
Verify the headlight fuses in the fuse box for continuity.
6
Check wiring and connectors for corrosion or loose connections.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, and a flashlight.
Ensure vehicle is parked on a level surface and turned off.
Disconnect the vehicle's battery to prevent electrical shock.

2. Inspect and Replace Headlight Bulbs

Open the front trunk to access the headlight assembly.
Remove the headlight assembly cover by twisting counterclockwise.
Disconnect the wiring harness from the back of the headlight bulb.
Remove the faulty bulb by twisting it counterclockwise and pulling it out.
Install the new bulb, ensuring it is securely in place and not touching the glass with bare hands.
Reconnect the wiring harness and replace the cover by twisting it clockwise.

3. Check and Replace Fuses

Locate the fuse box, typically found under the dashboard or near the front trunk.
Identify the headlight fuse using the fuse map on the cover.
Use a multimeter to check for continuity in the fuse.
If the fuse is blown, replace it with a new fuse of the same amperage.
Reassemble the fuse box cover.

4. Verify Wiring and Connectors

Inspect the wiring leading to the headlight assembly for frays or breaks.
Clean any corrosion from connectors using electrical contact cleaner.
Ensure all connections are tight and secure.

5. Reconnect Battery and Test

Reconnect the vehicle's battery terminals.
Turn on the headlight switch to test functionality.
Observe for any error messages on the dashboard.