why is my Toyota Highlander Third Generation (2014-2019) rear window wiper not working?

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

546 words

Problem Statement

Learn how to diagnose and fix the rear window wiper issue in Toyota Highlander (2014-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the vehicle to cool down before handling any components in the rear area.

Symptoms

•Rear wiper does not operate when activated
•No sound or movement from the rear wiper motor
•Rear wiper blade appears to be stuck in one position
•Potential water or moisture buildup around the rear wiper motor area
•Front wipers may work normally, indicating an isolated issue

Diagnostic Steps

1
Check the rear wiper fuse using the owner's manual for the specific fuse location and rating.
2
Test the rear wiper switch on the steering column or dashboard for functionality.
3
Inspect the wiring and connectors leading to the rear wiper motor for signs of damage or corrosion.
4
Use a multimeter to check for voltage at the rear wiper motor when the switch is activated.
5
Remove the rear wiper arm and manually inspect the motor for any physical obstructions or damage.
6
If accessible, test the rear wiper motor directly to ensure it is operational.

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

•Socket set
•Multimeter
•Flathead screwdriver
•Safety goggles

Parts Required

•Rear wiper motor (if defective)
•Wiper switch (if faulty)
•Rear wiper blade (if worn)

Related Faults

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Diagnostic Steps

1
Check the rear wiper fuse using the owner's manual for the specific fuse location and rating.
2
Test the rear wiper switch on the steering column or dashboard for functionality.
3
Inspect the wiring and connectors leading to the rear wiper motor for signs of damage or corrosion.
4
Use a multimeter to check for voltage at the rear wiper motor when the switch is activated.
5
Remove the rear wiper arm and manually inspect the motor for any physical obstructions or damage.
6
If accessible, test the rear wiper motor directly to ensure it is operational.

Solution

1. Preparation

Gather tools: Socket set, multimeter, flathead screwdriver, and safety goggles.
Ensure the vehicle is parked on a level surface and the ignition is off.

2. Check and Replace Fuse

Locate the fuse box (refer to the owner's manual for location).
Identify the rear wiper fuse and inspect it for continuity using a multimeter.
If blown, replace with a fuse of the same rating (typically 15A).

3. Inspect and Replace Wiper Switch

Remove the steering column cover using a flathead screwdriver.
Disconnect the battery to avoid electrical shock.
Unplug the wiper switch connector and test the switch with a multimeter for continuity.
If faulty, replace the switch with an OEM equivalent.

4. Inspect Wiring and Connectors

Visually inspect wiring harnesses leading to the rear wiper motor for fraying or corrosion.
Clean any corroded connectors with electrical contact cleaner and reconnect.

5. Test and Replace Rear Wiper Motor

Remove the rear wiper arm using a socket set.
Disconnect the rear wiper motor from its electrical connector.
Test the motor using a multimeter for continuity and proper function.
If defective, replace the rear wiper motor with an OEM part.
Reinstall the wiper arm and ensure it is properly aligned.