how to fix the fog lights on my Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

4 min read

610 words

Problem Statement

Learn how to diagnose and fix fog lights not working on Tesla Model S (2012-2020). 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 12V battery before working on electrical components to prevent shock or short circuits.

Symptoms

•Fog lights do not illuminate when activated
•Fog light indicator on the dashboard is unlit or flickering
•Dimming or flickering of other lights when fog lights are engaged
•Burned smell or visible damage around the fog light housing
•Corrosion or loose connections at the fog light connectors

Diagnostic Steps

1
Check the fog light switch in the cabin to ensure it is functioning correctly.
2
Use an OBD-II scanner to check for any related error codes that may indicate electrical issues.
3
Inspect the fog light bulbs visually for any signs of damage or burnouts.
4
Test the fog light fuse in the fuse box for continuity and replace it if blown.
5
Inspect the wiring and connectors for corrosion, damage, or loose connections.
6
Measure voltage at the fog light connector to verify power is being supplied.

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

•Socket set
•Multimeter
•OBD-II scanner
•Electrical contact cleaner

Parts Required

•Fog light bulbs (specific to Tesla Model S)
•Fog light fuse (if blown)

Related Faults

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Diagnostic Steps

1
Check the fog light switch in the cabin to ensure it is functioning correctly.
2
Use an OBD-II scanner to check for any related error codes that may indicate electrical issues.
3
Inspect the fog light bulbs visually for any signs of damage or burnouts.
4
Test the fog light fuse in the fuse box for continuity and replace it if blown.
5
Inspect the wiring and connectors for corrosion, damage, or loose connections.
6
Measure voltage at the fog light connector to verify power is being supplied.

Solution

1. Preparation

Gather tools: socket set, multimeter, OBD-II scanner, and replacement bulbs/fuses if necessary.
Disconnect the vehicle's 12V battery to prevent electrical shock or short circuits.

2. Replace Fog Light Bulbs

Access Fog Light Assembly
- Depending on the side, remove the wheel well liner or undercarriage shield using a socket set.
Remove Fog Light Assembly
- Unplug the electrical connector from the fog light.
- Unscrew the retaining screws holding the fog light in place.
Replace the Bulb
- Twist and remove the old bulb from the fog light assembly.
- Insert the new bulb securely, ensuring not to touch the glass with bare hands.
- Reattach the fog light assembly to the vehicle.
Reconnect Electrical Connector
- Plug the electrical connector back into the fog light.

3. Replace Fog Light Fuse (If Necessary)

Locate the Fuse Box
- Refer to the owner's manual for the specific location of the fuse box.
Identify the Fog Light Fuse
- Use the fuse diagram in the fuse box to locate the fog light fuse.
Remove and Inspect the Fuse
- Use a fuse puller or pliers to remove the fuse.
- Inspect it for continuity; replace it with a new fuse of the same amperage if blown.
Reassemble the Fuse Box
- Reinsert the fuse and close the fuse box cover.

4. Check Wiring and Connections

Inspect Wiring
- Check for any visible signs of wear or damage in the wiring leading to the fog lights.
Clean Connections
- Clean any corroded connectors with electrical contact cleaner.
- Ensure all connections are snug and secure.