how to fix the rear wiper not working on my Toyota Highlander XU70 (2020-Present)

Toyota Highlander XU70 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

504 words

Problem Statement

Learn how to diagnose and fix the rear wiper not working on your Toyota Highlander XU70. 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 battery before working on electrical components to avoid shocks or shorts.

Symptoms

•Rear wiper does not activate when switched on
•Rear wiper blade remains stationary
•No sound or movement from the wiper motor
•Rear washer fluid not spraying (if equipped)
•Dashboard warning light illuminated (if applicable)

Diagnostic Steps

1
Inspect the rear wiper switch for proper operation.
2
Check the rear wiper fuse in the fuse box for continuity.
3
Test the wiring and connections leading to the rear wiper motor.
4
Use a multimeter to check for voltage at the rear wiper motor connector when the switch is activated.
5
Inspect the rear wiper motor for physical damage or corrosion.
6
Verify the operation of the rear washer fluid system, if applicable.

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
•Screwdriver set
•Wire stripper/crimper

Parts Required

•Rear wiper motor (if replacement is necessary)
•Rear wiper fuse (if blown)

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Diagnostic Steps

1
Inspect the rear wiper switch for proper operation.
2
Check the rear wiper fuse in the fuse box for continuity.
3
Test the wiring and connections leading to the rear wiper motor.
4
Use a multimeter to check for voltage at the rear wiper motor connector when the switch is activated.
5
Inspect the rear wiper motor for physical damage or corrosion.
6
Verify the operation of the rear washer fluid system, if applicable.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Tools Required:
- Socket set
- Multimeter
- Screwdriver set
- Wire stripper/crimper (if needed)

2. Inspect and Replace the Fuse

Locate the fuse box and find the rear wiper fuse.
Remove the fuse using a fuse puller or pliers.
Inspect the fuse; if blown, replace it with a new fuse of the same amperage (typically 15A).
Reinstall the fuse and reconnect the battery terminal.

3. Test the Rear Wiper Motor

Remove the rear wiper arm by loosening the retaining nut with a socket wrench.
Disconnect the wiring harness from the rear wiper motor.
Using a multimeter, check for continuity from the harness to the motor.
If the motor has continuity, connect it directly to a 12V power source to test for operation.
If the motor does not operate, proceed to replace it.

4. Replace the Rear Wiper Motor (if necessary)

Remove any mounting screws securing the rear wiper motor.
Carefully pull the motor out of its bracket.
Install the new rear wiper motor in reverse order of removal.
Reconnect the wiring harness and secure the motor with screws.
Reattach the rear wiper arm and ensure it is secured properly.