how to fix the wipers not turning off in Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

521 words

Problem Statement

Learn how to diagnose and fix windshield wipers that won't turn off in Toyota Highlander 2014-2019. Step-by-step guide with tools and parts required.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent shock or short circuits.

Symptoms

•Wipers continue to operate when the switch is off
•Intermittent wiper function does not stop
•Wiper motor is running continuously
•Possible drain on the vehicle's battery
•No response from wiper controls

Diagnostic Steps

1
Inspect the wiper switch for physical damage or wear.
2
Use an OBD-II scanner to check for any related error codes.
3
Verify the operation of the wiper relay by listening for clicking sounds when the wiper switch is toggled.
4
Disconnect the wiper motor connector and check for voltage at the connector when the switch is activated.
5
Inspect the body control module for any signs of corrosion or damage.
6
Check the wiper motor for any internal faults by manually testing it with direct power.

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

•Screwdriver set
•Relay puller or flathead screwdriver
•Socket set
•Multimeter

Parts Required

•Wiper switch (if damaged)
•Wiper relay
•Wiper motor (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the wiper switch for physical damage or wear.
2
Use an OBD-II scanner to check for any related error codes.
3
Verify the operation of the wiper relay by listening for clicking sounds when the wiper switch is toggled.
4
Disconnect the wiper motor connector and check for voltage at the connector when the switch is activated.
5
Inspect the body control module for any signs of corrosion or damage.
6
Check the wiper motor for any internal faults by manually testing it with direct power.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface, and the ignition is off.

2. Inspect Wiper Switch

Tools Required: Screwdriver set
Remove the steering column cover using a screwdriver.
Disconnect the wiper switch connector and inspect for damage or corrosion.
If the switch is faulty, replace it with a new one.

3. Replace Wiper Relay

Tools Required: Relay puller or flathead screwdriver
Locate the wiper relay in the fuse box (refer to the owner's manual for exact location).
Remove the old relay by pulling it straight out.
Insert a new relay in its place, ensuring it is seated properly.

4. Check/Replace Wiper Motor

Tools Required: Socket set, multimeter
Disconnect the negative battery terminal.
Remove the wiper arms (use a puller if necessary) for access to the motor.
Disconnect the wiper motor connector and test for voltage using a multimeter.
If no voltage or the motor is faulty, remove the motor by unscrewing the mounting bolts and disconnecting it.
Install the new wiper motor by reversing the removal steps.

5. Reassemble and Test

Reattach the wiper arms and secure any covers or panels removed.
Reconnect the negative battery terminal.
Turn on the ignition and test the wipers for proper function.