how to fix the rear wiper not working on my Toyota Highlander Fourth Generation (2020-present)

Toyota Highlander Fourth Generation (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

519 words

Problem Statement

Learn how to diagnose and fix the rear wiper not working on your Toyota Highlander (2020-present). Step-by-step guide with symptoms and solutions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or short circuits.

Symptoms

•Rear wiper does not operate when activated
•No sound from the wiper motor when switched on
•Wiper blade does not move
•Rear window washer fluid not spraying
•Possible blown fuse

Diagnostic Steps

1
Inspect the rear wiper switch on the steering column for functionality.
2
Check the fuse for the rear wiper in the fuse box and replace if blown.
3
Test the rear wiper motor by applying direct power to it.
4
Inspect the wiring harness for any loose connections or damage.
5
Check the rear wiper linkage for any obstructions or mechanical failure.

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
•Pliers
•Jumper wires
•Electrical tape
•Fuse puller

Parts Required

•Replacement fuse (if necessary)
•Rear wiper motor (if faulty)
•Wiper linkage (if damaged)

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Diagnostic Steps

1
Inspect the rear wiper switch on the steering column for functionality.
2
Check the fuse for the rear wiper in the fuse box and replace if blown.
3
Test the rear wiper motor by applying direct power to it.
4
Inspect the wiring harness for any loose connections or damage.
5
Check the rear wiper linkage for any obstructions or mechanical failure.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Fuse Inspection and Replacement

Locate the fuse box under the dashboard on the driver's side.
Remove the cover and identify the fuse for the rear wiper (refer to the diagram on the fuse box cover).
Use a fuse puller or pliers to remove the fuse and check if it is blown.
If blown, replace it with a fuse of the same amperage (typically 15A).

3. Testing the Wiper Motor

Locate the rear wiper motor, usually found under the rear hatch panel.
Disconnect the electrical connector from the motor.
Using jumper wires, connect the motor directly to the battery to see if it operates.
- Positive wire to the positive terminal of the battery.
- Negative wire to the negative terminal of the battery.
If the motor operates, the issue may lie with the switch or wiring.

4. Inspecting Wiring and Connections

Visually inspect the wiring harness leading to the wiper motor for any signs of wear, fraying, or disconnection.
Reconnect any loose connectors and secure any exposed wires with electrical tape.

5. Rear Wiper Linkage Check

Remove the rear wiper arm using a socket or ratchet.
Once the arm is removed, check the wiper linkage mechanism for any binding, rust, or damage.
Clean any rust and lubricate moving parts if necessary.
If the linkage is damaged, replace it with a new part.