my Toyota Highlander Third Generation (2014-2019) windshield wipers won’t turn off, what should I do...

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

505 words

Problem Statement

Learn how to diagnose and fix windshield wipers that won't turn off in a Toyota Highlander (2014-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Windshield wipers operate continuously regardless of switch position
•Wiper control stalk does not respond to user input
•Wiper motor running without use of wipers
•Possible intermittent wiper function remains active even when switched off
•Potential drain on battery if left unattended

Diagnostic Steps

1
Inspect the wiper control stalk for physical damage or obstruction.
2
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the wiper system.
3
Check the fuses related to the windshield wiper system for any blown fuses.
4
Verify the wiper motor and relay operation by testing for power at the motor connector.
5
Examine the wiper control module for signs of malfunction or water intrusion.

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
•Multimeter

Parts Required

•Wiper control stalk (if replacement is necessary)
•Wiper relay (if replacement is necessary)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Inspect the wiper control stalk for physical damage or obstruction.
2
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the wiper system.
3
Check the fuses related to the windshield wiper system for any blown fuses.
4
Verify the wiper motor and relay operation by testing for power at the motor connector.
5
Examine the wiper control module for signs of malfunction or water intrusion.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Remove the Wiper Control Stalk

Tools Required: Screwdriver set
Locate the screws securing the steering column cover and remove them.
Carefully detach the steering column cover to access the wiper control stalk.
Disconnect the electrical connector from the wiper control stalk and remove the stalk from the steering column.

3. Inspect and Replace the Wiper Control Stalk

Inspect the wiper control stalk for any signs of damage or internal failure.
If damaged, replace the wiper control stalk with a new one.
Reconnect the electrical connector to the new stalk and secure it back onto the steering column.

4. Check the Wiper Relay and Fuses

Tools Required: Multimeter
Locate the fuse box and identify the fuse for the windshield wipers.
Use a multimeter to test the continuity of the fuse; replace if necessary.
Locate the wiper relay and swap it with an identical relay from another system if available, or replace it if faulty.

5. Reassemble and Test

Reattach the steering column cover and secure it with screws.
Reconnect the negative battery terminal.
Test the wipers to ensure they operate correctly in all modes.