FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
How do I fix the malfunctioning fog lights on my 2020 Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How do I fix the malfunctioning fog lights on my 2020 Highlander?

How do I fix the malfunctioning fog lights on my 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
607 words

Problem Statement

Learn how to diagnose and repair malfunctioning fog lights on your 2020 Toyota Highlander with step-by-step instructions.

Affected Component
fog lights

Symptoms

  • •Fog Lights Not Turning On
  • •Flickering Fog Lights
  • •Dim Fog Lights

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

  • •Multimeter
  • •Screwdriver set (flathead and Phillips)
  • •Pliers
  • •Replacement fog light bulbs (if necessary)
  • •Replacement fuse (if necessary)
  • •Relay (if necessary)

Additional Information

Affected Component
fog lights
Difficulty
medium
Severity
medium
Tools Required
6 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
Fixing Malfunctioning Fog Lights on a 2020 Toyota Highlander
Tools Required
  • Multimeter
  • Screwdriver set (flathead and Phillips)
  • Pliers
  • Replacement fog light bulbs (if necessary)
  • Replacement fuse (if necessary)
  • Relay (if necessary)

Repair Instructions

  1. Replacing Fog Light Bulbs:

    • Turn off the vehicle and ensure the lights are off.
    • Open the hood and locate the fog light assembly (usually located in the bumper).
    • Remove the retaining screws or clips securing the fog light assembly.
    • Disconnect the electrical connector from the back of the fog light.
    • Remove the old bulb by twisting it counterclockwise and pulling it out.
    • Insert the new bulb, ensuring it is securely in place.
    • Reconnect the electrical connector and reassemble the fog light housing.

  2. Replacing the Fog Light Fuse:

    • Open the fuse box cover and locate the fog light fuse.
    • Use pliers to pull the blown fuse out.
    • Insert a new fuse of the same amperage.
    • Close the fuse box cover and test the fog lights.

  3. Replacing the Fog Light Relay:

    • Open the fuse box and locate the fog light relay.
    • Carefully pull the relay out of its socket.
    • Insert a new relay into the same socket.
    • Test the fog lights to check for functionality.

  4. Repairing Wiring and Connectors:

    • If any wiring is damaged, use wire strippers to remove the insulation around the damaged section.
    • Use heat-shrink tubing or electrical tape to insulate and protect the repaired area.
    • Ensure all connectors are secure; replace any corroded connectors.

  5. Final Testing:

    • After completing repairs, start the vehicle.
    • Turn on the headlights and fog lights to ensure they operate correctly.
    • Check for consistent brightness and proper alignment.
Summary

By following the diagnostic steps and repair instructions outlined above, you should be able to identify and fix the malfunctioning fog lights on your 2020 Toyota Highlander. If problems persist after these repairs, consider consulting a professional technician for further diagnosis.