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

How can I fix a malfunctioning fog light in my 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-3 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
673 words

Problem Statement

Learn how to diagnose and repair a malfunctioning fog light in your 2020 Toyota Highlander with step-by-step instructions.

Affected Component
fog light
Estimated Time
2-3 hours

Symptoms

  • •Fog light does not turn on when activated.
  • •Fog light is dim or flickering.
  • •Fog light appears burnt out or discolored.
  • •Fog light lens is cracked or cloudy.

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

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
  • •Pliers
  • •Replacement fog light bulb
  • •Wire brush or contact cleaner
  • •Safety gloves and goggles

Additional Information

Affected Component
fog light
Estimated Time
2-3 hours
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 a Malfunctioning Fog Light in a 2020 Toyota Highlander

Tools Required
  • Multimeter
  • Screwdriver set
  • Pliers
  • Replacement fog light bulb (check owner’s manual for specifications)
  • Wire brush or contact cleaner (if corrosion is present)
  • Safety gloves and goggles
Repair Instructions
Step 1: Replace the Fog Light Bulb
  1. Safety First: Disconnect the battery to prevent any electrical shock or short circuits.
  2. Access the Fog Light:
    • Depending on the design, you may need to access the fog light from below the vehicle or through the wheel well.
    • Remove any necessary panels or wheel liners to gain access.
  3. Remove the Fog Light Bulb:
    • Twist the bulb socket counterclockwise to remove it from the fog light housing.
    • Carefully pull the old bulb out of the socket.
  4. Install New Bulb:
    • Take the new bulb (ensure it’s the correct type) and insert it into the socket without touching the glass.
    • Reinsert the bulb socket into the fog light housing and twist it clockwise to secure it.
Step 2: Check and Replace Fuses
  1. Locate the Fuse Box:
    • Find the fuse box under the dashboard or in the engine bay; refer to the owner’s manual for exact location.
  2. Check the Fog Light Fuse:
    • Use the fuse puller or pliers to remove the fog light fuse.
    • Inspect it for continuity; if the metal strip is broken, the fuse is blown and needs replacement.
  3. Replace the Fuse:
    • Insert a new fuse with the same amperage rating and ensure it is securely in place.
Step 3: Inspect Wiring and Connectors
  1. Check for Damage:
    • Inspect the wiring leading to the fog lights for any signs of wear, fraying, or disconnection.
    • Use the multimeter to check for continuity along the wiring.
  2. Repair or Replace Wires:
    • If any wires are damaged, use wire connectors to repair or replace them as necessary.
Step 4: Check the Fog Light Switch
  1. Testing the Switch:
    • Use the multimeter to check for continuity through the fog light switch when activated.
    • If there’s no continuity, the switch may need replacement.
  2. Replace the Switch:
    • Disconnect the battery before removing the switch.
    • Remove the trim panel if necessary, then unscrew and unplug the faulty switch.
    • Install a new switch by reversing the removal steps.
Step 5: Reassemble and Test
  1. Reconnect the Battery: Once all repairs are complete, reconnect the battery terminal.
  2. Test the Fog Lights: Activate the fog lights to confirm they are functioning properly.
Conclusion

By following these detailed steps, you should be able to diagnose and repair the malfunctioning fog light on your 2020 Toyota Highlander. If the issue persists after all checks and repairs, consider consulting a professional technician for further diagnosis.