how to fix the power windows not working on my 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

556 words

Problem Statement

Learn how to diagnose and fix power windows not working on 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 systems to prevent shock or short circuits.
•Ensure the vehicle is in park with the ignition off before starting repairs.

Symptoms

•Power window switches do not respond
•Windows are completely unresponsive
•Possible clicking sound when switch is pressed
•Other electrical components (e.g., door locks) may also be non-functional
•Warning lights on dashboard related to the electrical system may illuminate

Diagnostic Steps

1
Inspect the power window fuse in the fuse box for any signs of damage or blown fuses.
2
Use an OBD-II scanner to check for any related error codes that may indicate electrical issues.
3
Test each power window switch for functionality using a multimeter.
4
Check the wiring harnesses in the doors and under the dashboard for any visible damage or disconnections.
5
Verify the operation of the power window relay by swapping it with a similar functioning relay in the fuse box.
6
Inspect the power window motor by applying direct battery voltage to determine if the motor is functional.

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

•OBD-II scanner
•Multimeter
•Socket set
•Trim removal tools
•Fuse puller

Parts Required

•Power window fuse (if blown)
•Power window switch (if faulty)
•Power window motor (if faulty)

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Diagnostic Steps

1
Inspect the power window fuse in the fuse box for any signs of damage or blown fuses.
2
Use an OBD-II scanner to check for any related error codes that may indicate electrical issues.
3
Test each power window switch for functionality using a multimeter.
4
Check the wiring harnesses in the doors and under the dashboard for any visible damage or disconnections.
5
Verify the operation of the power window relay by swapping it with a similar functioning relay in the fuse box.
6
Inspect the power window motor by applying direct battery voltage to determine if the motor is functional.

Solution

1. Preparation

Gather tools and parts required.
Disconnect the negative battery terminal to ensure safety during electrical work.

2. Check and Replace Fuse

Locate the fuse box (usually under the dashboard or in the engine compartment).
Remove the power window fuse using a fuse puller or pliers.
Inspect the fuse visually; if blown, replace it with a fuse of the same amperage (typically 30A).
Reconnect the battery and test the windows.

3. Inspect and Replace Window Switch

Remove the door panel using a socket set and trim removal tools.
Disconnect the wiring harness from the window switch.
Test the switch using a multimeter; if it fails, replace it with a new switch.
Reassemble the door panel after the replacement.

4. Check and Replace Window Motor

If the switch is functional, move to the window motor.
Remove the door panel to access the power window motor.
Disconnect the motor’s wiring harness.
Test the motor by applying direct battery voltage; if it does not operate, replace the motor.
Install the new motor and reassemble the door panel.

5. Reassemble and Test

Ensure all components are securely installed.
Reconnect the battery terminal.
Test each window to ensure they operate correctly.