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How do I address issues with the headlights not turning on in my 2020 Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How do I address issues with the headlights not turning on in my 2020 Highlander?

How do I address issues with the headlights not turning on in my 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn how to diagnose and fix headlight issues in your 2020 Toyota Highlander with our step-by-step guide covering symptoms, tools needed, and repair instructions.

Affected Component
headlights
Estimated Time
1-2 hours

Symptoms

  • •Headlights do not turn on at all
  • •One headlight is out
  • •Flickering headlights

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

  • •Fuse puller or needle-nose pliers
  • •Multimeter
  • •Wire brush
  • •Screwdriver set
  • •Replacement headlight bulbs
  • •Replacement fuses
  • •Electrical connectors (if needed)

Additional Information

Affected Component
headlights
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
7 items

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Back to Generation

If your headlights are not turning on in your 2020 Toyota Highlander, there could be several potential causes. Below is a detailed guide addressing symptoms, diagnostic steps, tools required, and repair instructions.

Repair Instructions

If the Issue is a Blown Fuse

  1. Locate the Fuse Box

    • Find the fuse box under the dashboard or in the engine compartment.

  2. Identify the Headlight Fuse

    • Refer to the owner’s manual for the specific fuse location.

  3. Replace the Blown Fuse

    • Remove the blown fuse using a fuse puller.
    • Install a new fuse of the same amperage rating.

If the Bulb is Burnt Out

  1. Remove the Headlight Assembly

    • Open the hood and locate the headlight assembly.
    • Remove any retaining clips or screws securing the headlight.
    • Carefully pull the headlight assembly out.

  2. Replace the Bulb

    • Disconnect the power connector from the back of the bulb.
    • Remove the old bulb and insert the new bulb, ensuring not to touch the glass part with bare hands (use gloves).
    • Reconnect the power connector.

  3. Reinstall the Headlight Assembly

    • Place the headlight assembly back into position and secure it with clips or screws.

If Wiring or Ground Issues are Present

  1. Repair or Replace Damaged Wiring

    • If any wiring is damaged, cut out the damaged section and splice in a new wire using solder or butt connectors.

  2. Clean Ground Connection

    • Remove the ground connection, clean it with a wire brush, and re-secure it tightly.

If the Relay is Faulty

  1. Locate the Relay

    • Refer to the owner’s manual for the location of the headlight relay.

  2. Test the Relay

    • Use a multimeter to check for continuity. If it’s defective, replace it with a new relay.
Final Checks

  1. Turn on the Headlights

    • After completing repairs, turn the ignition on and check if the headlights operate correctly.

  2. Test High/Low Beams

    • Test both high and low beam functions to ensure both are working.

  3. Check for Additional Issues

    • If the headlights still do not work, further diagnosis may be needed, potentially involving the body control module (BCM) or wiring diagrams for advanced troubleshooting.
Tools Required Summary
  • Fuse puller or needle-nose pliers
  • Multimeter
  • Wire brush
  • Screwdriver set
  • Replacement headlight bulbs
  • Replacement fuses
  • Electrical connectors (if needed)
Conclusion

By following these detailed diagnostic and repair steps, you should be able to identify and resolve the issue with the headlights on your 2020 Toyota Highlander. If problems persist after these checks, it may be advisable to consult a professional technician or visit a Toyota dealership for further diagnosis.