why are my Toyota Highlander wipers not working, what should I check?

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

480 words

Problem Statement

Learn how to diagnose and fix non-working wipers on Toyota Highlander. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

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 avoid shorts or shocks.

Symptoms

•Wipers do not operate at all when activated
•Wipers operate intermittently or only on certain speeds
•No noise or movement from the wiper motor
•Wipers move slowly or erratically
•Washer fluid does not spray when activated

Diagnostic Steps

1
Inspect the wiper fuse for any signs of blown fuses.
2
Check the wiper relay to ensure it is functioning properly.
3
Test the wiper switch for continuity using a multimeter.
4
Examine the wiring harness for any visible damage or corrosion.
5
Inspect the wiper motor for proper mounting and electrical connections.
6
Verify that the wiper linkage is not binding or obstructed.

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
•Fuse puller

Parts Required

•Wiper fuse (if blown)
•Wiper relay (if faulty)
•Wiper motor (if defective)

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Diagnostic Steps

1
Inspect the wiper fuse for any signs of blown fuses.
2
Check the wiper relay to ensure it is functioning properly.
3
Test the wiper switch for continuity using a multimeter.
4
Examine the wiring harness for any visible damage or corrosion.
5
Inspect the wiper motor for proper mounting and electrical connections.
6
Verify that the wiper linkage is not binding or obstructed.

Solution

1. Preparation

Tools Required: Socket set, multimeter, fuse puller.
Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Check and Replace the Wiper Fuse

Locate the fuse box (usually under the dashboard or in the engine compartment).
Use a fuse puller to remove the wiper fuse.
Inspect the fuse for continuity. If blown, replace it with a fuse of the same amperage.

3. Inspect and Test the Wiper Relay

Remove the relay from the fuse box.
Use a multimeter to check for continuity. Replace the relay if it is faulty.

4. Test the Wiper Switch

Remove the steering column cover to access the wiper switch.
Use a multimeter to check for continuity across the switch terminals while operating the wiper stalk. Replace if defective.

5. Inspect the Wiper Motor

Remove the wiper arms by unscrewing the nuts securing them.
Disconnect the electrical connector from the wiper motor.
Test the motor directly by applying battery voltage to the motor terminals. Replace the motor if it does not operate.

6. Check Wiper Linkage

Inspect the wiper linkage for any signs of wear or damage.
Ensure the linkage is properly lubricated and free of obstructions. Replace if necessary.