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What should I check if my 2020 Toyota Highlander’s fog lights are not working? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What should I check if my 2020 Toyota Highlander’s fog lights are not working?

What should I check if my 2020 Toyota Highlander’s fog lights are not working?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn how to diagnose and repair fog light issues on your 2020 Toyota Highlander with our step-by-step guide.

Affected Component
fog lights
Estimated Time
1-2 hours

Symptoms

  • •Fog lights do not illuminate when activated.
  • •Indicator light on the dashboard for fog lights may not illuminate.
  • •Other exterior lights (headlights, turn signals) are functioning normally.

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

  • •Fuse puller or needle-nose pliers
  • •Multimeter
  • •Flathead screwdriver
  • •Replacement bulbs (H11 for the Highlander)
  • •Wire strippers
  • •Electrical tape
  • •Soldering iron
  • •Relay tester (optional)

Additional Information

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

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Back to Generation

Certainly! If your 2020 Toyota Highlander's fog lights are not working, you can follow this structured approach to diagnose and potentially fix the problem.

Step 1: Check the Fog Light Switch

  1. Symptoms: Ensure that the fog light switch is being engaged properly. If the switch is faulty, it may not send power to the fog lights.
  2. Tools Required: None, just your hands.
  3. Action:
    • Turn on the vehicle and activate the fog light switch.
    • Listen for any audible clicks or feel for a tactile response from the switch.

Step 2: Inspect the Fuse

  1. Symptoms: A blown fuse can cause the fog lights to not work.
  2. Tools Required: Fuse puller or needle-nose pliers, multimeter (optional).
  3. Action:
    • Locate the fuse box. For the 2020 Highlander, it can be found under the dashboard on the driver’s side or in the engine compartment.
    • Refer to the owner’s manual for the specific location of the fog light fuse (typically labeled as “Fog Lights”).
    • Remove the fuse and inspect it. If the metal strip inside is broken or burnt, it is blown.
    • Optional: Use a multimeter to check for continuity.

Step 3: Check the Bulbs

  1. Symptoms: Burned-out bulbs will prevent fog lights from functioning.
  2. Tools Required: Flathead screwdriver, replacement bulbs (H11 for the Highlander).
  3. Action:
    • Access the fog light housing from underneath the vehicle or by removing the wheel well cover if necessary.
    • Twist the bulb socket counterclockwise to remove it from the housing.
    • Inspect the bulb for any signs of damage or a broken filament.
    • Replace the bulb if necessary, ensuring it is seated properly.

Step 4: Inspect Wiring and Connectors

  1. Symptoms: Damaged wiring or loose connectors can interrupt the power supply to the fog lights.
  2. Tools Required: Multimeter, wire strippers, electrical tape, and possibly soldering iron.
  3. Action:
    • Visually inspect the wiring connected to the fog lights and the connectors for any signs of wear, fraying, or corrosion.
    • Use a multimeter to check for voltage at the connector when the fog lights are activated. If no voltage is present, trace the wiring back to the switch and fuse to check for issues.
    • Repair any damaged wiring with electrical tape or replace sections of wiring as needed.

Step 5: Check the Relay (if applicable)

  1. Symptoms: A faulty relay may prevent power from reaching the fog lights.
  2. Tools Required: Multimeter, relay tester (optional).
  3. Action:
    • Locate the relay for the fog lights in the fuse box (usually labeled).
    • Remove the relay and test it for continuity using a multimeter. If it does not show continuity when energized, the relay is faulty.
    • Replace with a compatible relay if necessary.
Repair Instructions
  1. Replace the Fuse: If the fuse is blown, replace it with one of the same amperage rating.
  2. Install New Bulbs: Replace any burned-out bulbs with new ones, ensuring they match the specifications.
  3. Repair Wiring: If any wiring was damaged, repair it with electrical tape or replace it as necessary.
  4. Replace Relay: If the relay is faulty, replace it with a new one, ensuring the part number matches.
Final Steps
  1. Test Fog Lights: After making repairs, turn on the vehicle and activate the fog lights to ensure they are functioning correctly.
  2. Reassemble: If any components were removed (like covers or wheel well liners), reassemble them securely.
  3. Document the Repair: Keep a record of any parts replaced for future reference.

If after these steps the fog lights still do not work, it may be necessary to consult a professional technician for further diagnosis.