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how to fix the fog lights not working on my Toyota Highlander Third Generation (2014-2019) - Toyota Highlander
Home/Cars/Toyota/Highlander/Third Generation (2014-2019)/how to fix the fog lights not working on my Toyota Highlander Third Generation (2014-2019)

how to fix the fog lights not working on my Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

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

Problem Statement

Learn how to diagnose and fix fog lights not working on Toyota Highlander (2014-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component
Electrical
Estimated Time
1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems to avoid shocks or shorts.

Symptoms

  • •Fog lights do not illuminate when activated
  • •Fog light indicator on the dashboard is not lit
  • •No unusual noises when toggling the fog light switch
  • •Headlights function normally without issues
  • •Possible moisture or damage observed in fog light housing

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
  • •Socket set
  • •Screwdriver set
  • •Pliers
  • •Replacement fog light bulbs (if needed)
  • •Replacement fuse (if needed)

Parts Required

  • •Fog light bulbs (if needed)
  • •Fog light fuse (if needed)
  • •Wiring repair connectors (if needed)

Additional Information

Affected Component
Electrical
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
6 items
Parts Required
3 items

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Solution
1. Preparation
  • Gather necessary tools and parts.
  • Disconnect the vehicle's battery to ensure safety while working on electrical components.

Tools Required:

  • Multimeter
  • Socket set
  • Screwdriver set
  • Pliers
  • Replacement fog light bulbs (if needed)
  • Replacement fuse (if needed)
2. Inspect and Replace Fog Light Bulbs

  1. Access Fog Lights:

    • If necessary, remove the front grill or bumper cover to access the fog lights.
    • Use a socket set to remove any screws or bolts securing the fog light assembly.

  2. Remove Fog Light Bulbs:

    • Twist the fog light bulb socket counterclockwise to remove it from the fog light assembly.
    • Pull the bulb straight out from the socket.

  3. Install New Bulbs:

    • Insert the new fog light bulb into the socket, ensuring it is seated properly.
    • Twist the socket clockwise to secure it back into the fog light assembly.
3. Check and Replace Fog Light Fuse

  1. Locate Fuse Box:

    • Open the driver's side door and access the fuse box located near the dashboard.

  2. Identify Fog Light Fuse:

    • Refer to the owner's manual for the specific location of the fog light fuse.

  3. Remove and Inspect Fuse:

    • Use pliers to pull out the fog light fuse.
    • Inspect it visually for any signs of damage or breakage.

  4. Replace Fuse:

    • If the fuse is blown, replace it with a new fuse of the same amperage rating.
4. Verify Wiring and Relay

  1. Inspect Wiring:

    • Check the wiring harness connected to the fog lights for any signs of fraying or corrosion.
    • Repair or replace any damaged wiring as necessary.

  2. Test Relay (if applicable):

    • Locate the fog light relay in the fuse box.
    • Swap it with a similar relay to check for functionality or replace it if faulty.