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How can I fix the windshield wipers that won’t turn off in a 2021 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How can I fix the windshield wipers that won’t turn off in a 2021 Toyota Highlander?

How can I fix the windshield wipers that won’t turn off in a 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn how to diagnose and repair windshield wipers that won't turn off in a 2021 Toyota Highlander with step-by-step instructions.

Affected Component
wiper control system
Estimated Time
2-3 hours

Symptoms

  • •Windshield wipers continue to operate even after the wiper switch is turned to the off position.
  • •Wipers may operate erratically or in a continuous loop.
  • •Possible accompanying issues with the wiper control system, such as washer fluid spraying unexpectedly.

Diagnostic Steps

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

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

  • •OBD-II Scanner
  • •Multimeter
  • •Screwdrivers (Phillips and flathead)
  • •Pliers
  • •Replacement fuse and relay (if necessary)
  • •Service manual for wiring diagrams (optional, but helpful)

Additional Information

Affected Component
wiper control system
Estimated Time
2-3 hours
Difficulty
medium
Severity
medium
Tools Required
6 items

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Windshield Wipers Won't Turn Off - 2021 Toyota Highlander

Tools Required
  • OBD-II Scanner
  • Multimeter
  • Screwdrivers (Phillips and flathead)
  • Pliers
  • Replacement fuse and relay (if necessary)
  • Service manual for wiring diagrams (optional, but helpful)
Repair Instructions
Step 1: Inspect the Wiper Switch

  • Remove the Steering Column Cover:

    • Use a screwdriver to remove the screws securing the cover.
    • Carefully detach the cover to access the wiper switch.

  • Test the Wiper Switch:

    • Use a multimeter to test the continuity of the wiper switch.
    • If the switch shows continuity when in the OFF position, it may need replacing.
Step 2: Check and Replace the Fuse

  • Locate the Fuse:

    • Refer to the owner's manual for the exact fuse layout.

  • Check the Fuse:

    • Remove the fuse using pliers or a fuse puller.
    • Inspect it visually and with a multimeter to confirm if it is blown.

  • Replace the Fuse:

    • If blown, replace it with a new fuse of the same amperage.
Step 3: Test the Wiper Relay

  • Remove the Relay:

    • Pull the wiper control relay from the fuse box.

  • Test the Relay:

    • If you have a multimeter, test the relay for continuity.
    • If faulty, replace it with a new relay.
Step 4: Test the Wiper Motor

  • Disconnect the Wiper Motor:

    • Locate the wiper motor under the hood, usually located at the base of the windshield.
    • Disconnect the motor's electrical connector.

  • Test the Motor:

    • Use a multimeter to check for power at the motor connector while toggling the switch between on and off positions.
    • If power is present when the switch is off, the motor is likely faulty and needs replacement.
Step 5: Replace the Wiper Motor (if necessary)

  • Remove the Wiper Arm:

    • Use a flathead screwdriver to pry off the plastic cap covering the nut on the wiper arm.
    • Use a socket wrench to remove the nut and lift the wiper arm off.

  • Remove the Motor:

    • Disconnect any additional components or brackets securing the motor.
    • Remove the mounting bolts of the wiper motor and take it out.

  • Install the New Motor:

    • Place the new motor in position, secure it with the mounting bolts, and reconnect any components.

  • Reinstall the Wiper Arm:

    • Position the wiper arm back onto the motor and secure it with the nut. Reattach the plastic cap.
Step 6: Test the System
  • Reconnect the Battery (if it was disconnected).
  • Test the Wipers:
    • Turn on the ignition and operate the wiper switch to ensure they function correctly and turn off when switched off.
Conclusion

If the windshield wipers still do not function correctly after following these steps, further diagnosis may be needed, possibly involving the body control module. In such cases, consulting with a professional technician or contacting your local dealership may be advisable.