How can I troubleshoot the windshield wipers that are not working in my 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-3 hours

Time

medium

Difficulty

medium

Severity

4 min read

651 words

Problem Statement

Learn how to diagnose and repair windshield wiper issues on your 2020 Toyota Highlander with detailed steps and required tools.

Affected Component

windshield wipers

Estimated Time

2-3 hours

Symptoms

•Wipers Do Not Operate
•Wipers Move Erratically
•Wiper Motor Noise
•Washer Fluid Not Spraying

Diagnostic Steps

1
Check Wiper Switch
2
Inspect the Fuse
3
Test the Wiper Motor
4
Inspect Wiring and Connectors

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 (Phillips and flathead)
•Socket set
•Pliers
•Wire crimpers
•Replacement fuses
•Wiper motor

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Solution

Troubleshooting windshield wipers that are not working on a 2020 Toyota Highlander involves a systematic approach to identify the cause of the failure. Below are the detailed steps, including symptoms, diagnostic steps, tools required, and repair instructions.

Tools Required

Multimeter
Screwdrivers (Phillips and flathead)
Socket set
Pliers
Wire crimpers (if needed)
Replacement fuses (if applicable)
Wiper motor (if replacement is necessary)

Step 1: Check Wiper Switch

Inspect the Wiper Control: Ensure that the wiper stalk is in the correct position and functioning properly.
Test the Wiper Switch: Use a multimeter to check for continuity when the switch is activated. Refer to the vehicle’s wiring diagram for pin locations.

Step 2: Inspect the Fuse

Locate the Fuse Box: The fuse box in the Highlander is usually located under the dashboard on the driver's side or in the engine compartment.
Check Wiper Fuse: Use the vehicle's manual to locate the specific fuse for the windshield wipers (usually labeled as "Wiper" or "Windshield Wipers").
Test the Fuse: Pull the fuse out and inspect it for continuity; replace it if it is blown.

Step 3: Test the Wiper Motor

Access the Wiper Motor: Remove the wiper arms using a flathead screwdriver to pry off any covers and a socket wrench to unbolt the arms. Then, remove the cowl panel to access the motor.
Check Motor Power: Disconnect the wiper motor connector and use a multimeter to check for voltage at the motor connector when the wipers are activated.
- Expected voltage: Typically 12V.
- If there is no voltage, there may be an issue with the wiring or the wiper switch.
Test Motor Functionality: Connect the motor directly to a power source to check if it operates. If it does not work with direct power, the motor may need to be replaced.

Step 4: Inspect Wiring and Connectors

Check for Damage: Inspect the wiring harness leading to the wiper motor for any signs of damage, corrosion, or disconnection.
Connection Integrity: Ensure all connectors are secure and free of corrosion.

Repair Instructions

If the Wiper Switch is Faulty

Remove the Steering Column Cover: Use a screwdriver to remove screws and carefully detach the cover.
Replace the Wiper Switch: Disconnect the wiring harness from the faulty switch and install the new switch.
Reassemble: Reattach the steering column cover and test the wipers.

If the Fuse is Blown

Replace the Fuse: Simply replace the blown fuse with a new one of the same amperage.
Test the Wipers: Activate the wipers to check functionality.

If the Wiper Motor is Faulty

Remove the Wiper Motor: Unscrew the mounting bolts using a socket wrench and disconnect the wiring.
Install the New Wiper Motor: Position the new motor and secure it with bolts. Reconnect the wiring harness.
Reassemble the Wiper Arms and Cowl: Reattach any components removed for access, ensuring everything is secure.
Test the Wipers: Activate the wipers to confirm they are operational.

Conclusion

If the windshield wipers on your 2020 Toyota Highlander are not functioning, follow the diagnostic steps to identify the issue. Depending on the findings, you may need to replace the wiper switch, fuse, or motor. Always ensure you disconnect the battery before working on electrical components for safety. If the problem persists after performing these steps, consider consulting a professional technician or dealership for further diagnosis.