how to fix my Tesla Model S Original (2012-2020) fog lights not turning on

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

Learn how to diagnose and fix fog lights not turning on in 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 systems to prevent shorts or shocks.

Symptoms

•Fog lights do not illuminate when activated
•Fog light indicator on the dashboard is off
•Headlights function normally
•No unusual noises or flickering when attempting to turn on fog lights
•No error messages displayed on the vehicle's screen

Diagnostic Steps

1
Inspect the fog light switch for physical damage or malfunction.
2
Check the vehicle's settings to ensure fog lights are enabled.
3
Use an OBD-II scanner to check for any error codes related to lighting.
4
Visually inspect the fog light bulbs for damage or burn out.
5
Examine the fog light fuse in the fuse box for continuity.
6
Test the wiring connections to the fog lights for any signs of corrosion or disconnection.

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
•Fuse puller
•Socket set

Parts Required

•Fog light bulbs (if burned out)
•Fog light fuse (if blown)

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Diagnostic Steps

1
Inspect the fog light switch for physical damage or malfunction.
2
Check the vehicle's settings to ensure fog lights are enabled.
3
Use an OBD-II scanner to check for any error codes related to lighting.
4
Visually inspect the fog light bulbs for damage or burn out.
5
Examine the fog light fuse in the fuse box for continuity.
6
Test the wiring connections to the fog lights for any signs of corrosion or disconnection.

Solution

1. Preparation

Tools Required:
- OBD-II scanner
- Multimeter
- Fuse puller
- Socket set
Disconnect the vehicle's battery to ensure safety while working with electrical components.

2. Inspect and Replace Bulbs

Locate the fog light assembly beneath the front bumper.
Remove the fog light assembly by unscrewing any retaining screws and disconnecting the wiring harness.
Carefully remove the fog light bulbs from the assembly and inspect them for damage.
If burned out, replace with new bulbs (ensure they match the specifications for the Tesla Model S).
Reinstall the fog light bulbs and reconnect the wiring harness.

3. Check and Replace Fuse

Locate the fuse box, usually found under the dashboard or in the front trunk area.
Identify the fog light fuse using the diagram on the fuse box cover.
Use a fuse puller or needle-nose pliers to remove the fog light fuse and inspect for continuity using a multimeter.
If the fuse is blown, replace it with a new fuse of the same amperage (typically 15A).
Reinsert the fuse into the fuse box.

4. Test Wiring Connections

Reconnect the battery before testing the fog lights.
Activate the fog light switch and check the wiring connections at the fog light assembly.
Look for any loose connections or signs of corrosion; repair or replace as necessary.