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What are the common problems with the 2020 Toyota Highlander’s exterior lights? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the common problems with the 2020 Toyota Highlander’s exterior lights?

What are the common problems with the 2020 Toyota Highlander’s exterior lights?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
1-2 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
699 words

Problem Statement

Learn about common issues with the exterior lights of the 2020 Toyota Highlander, including symptoms, diagnostic steps, tools required, and repair instructions.

Affected Component
exterior lights
Estimated Time
1-2 hours

Symptoms

  • •One or both headlights are not functioning
  • •Flickering headlights
  • •Dimming headlights
  • •One or both taillights are not working
  • •Brake lights do not illuminate when the pedal is pressed
  • •Hyper-flashing turn signals
  • •Turn signals do not illuminate
  • •Turn signals stay on or do not flash
  • •Clicking sound when using the turn signals

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9

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
  • •Screwdrivers (flathead and Phillips)
  • •Socket set
  • •Replacement headlight bulbs
  • •Fuse puller or pliers
  • •Replacement bulbs
  • •Flasher relay (if needed)
  • •Basic hand tools (screwdrivers, etc.)

Additional Information

Affected Component
exterior lights
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
8 items

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Back to Generation
Common Problems with the 2020 Toyota Highlander’s Exterior Lights

The exterior lighting system on the 2020 Toyota Highlander (Fourth Generation) can experience several common issues. Below are some typical symptoms, diagnostic steps, tools required, and repair instructions for the common problems you might encounter.

1. Headlight Malfunction
Tools Required:
  • Multimeter
  • Screwdrivers (flathead and Phillips)
  • Socket set
  • Replacement headlight bulbs

Repair Instructions:

  1. Remove Headlight Assembly:

    • Open the hood and locate the headlight assembly.
    • Remove any screws or clips securing the assembly.
    • Gently pull the assembly forward to disconnect the wiring harness.

  2. Inspect and Replace Bulb:

    • If the bulb is burnt out, twist the bulb socket counterclockwise to remove it.
    • Replace it with a new bulb, ensuring not to touch the glass with bare hands.
    • Reinstall by twisting the socket clockwise.

  3. Reinstall Headlight Assembly:

    • Connect the wiring harness back to the headlight assembly.
    • Secure the assembly with screws or clips.
    • Test the headlights to ensure they function correctly.
2. Taillight Issues
Tools Required:
  • Fuse puller or pliers
  • Multimeter
  • Replacement bulbs
  • Basic hand tools (screwdrivers, etc.)

Repair Instructions:

  1. Access the Taillight Assembly:

    • Open the trunk and remove the trim panel to access the taillight assembly.
    • Remove the screws securing the taillight assembly and gently pull it out.

  2. Replace Bulbs:

    • Remove the bulb socket by twisting it counterclockwise.
    • Replace the faulty bulbs and reinstall the socket.

  3. Check and Replace Fuses:

    • Using the fuse puller, check the relevant fuses in the fuse box.
    • Replace any blown fuses with the same amperage rating.

  4. Reinstall Taillight Assembly:

    • Reinstall the taillight assembly by securing it with screws.
    • Test the taillights to ensure they are functioning properly.
3. Turn Signal Issues
Tools Required:
  • Multimeter
  • Replacement bulbs
  • Flasher relay (if needed)
  • Hand tools (screwdrivers, etc.)

Repair Instructions:

  1. Inspect and Replace Bulbs:

    • Access the turn signal assembly (may require removing the headlight or taillight assembly).
    • Replace any burnt-out bulbs.

  2. Test the Flasher Relay:

    • Locate the flasher relay in the fuse box (refer to the owner's manual).
    • Swap it with a similar relay (if available) to test if it resolves the issue.
    • Replace if defective.

  3. Check Wiring:

    • Inspect the wiring for any visible damage or loose connections.
    • Repair or replace any damaged wiring as necessary.

  4. Final Testing:

    • After completing the repairs, test the turn signals to confirm proper operation.
Conclusion

Addressing exterior lighting issues on the 2020 Toyota Highlander may require a systematic approach to diagnostics and repair. Always ensure safety first by disconnecting the battery when working on electrical systems and using appropriate personal protective equipment. If the problem persists after these repairs, consider consulting a professional technician or visiting a Toyota dealership for further diagnosis.