how to troubleshoot the power windows on Toyota Highlander Third Generation (2014-2019)

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a flat surface, and the ignition is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace the Fuse

• Locate the fuse box, typically found under the dashboard on the driver’s side or in the engine compartment.
• Remove the cover and locate the power window fuse using the diagram on the cover.
• Inspect the fuse; if blown, replace it with a fuse of the same amperage (typically 30A).
• Reinstall the fuse box cover.

3. Test the Window Switch

• Remove the door panel using a trim removal tool and socket set.
• Disconnect the window switch connector.
• Using a multimeter, check for continuity in the switch.
• If defective, replace the window switch with a new part.

4. Inspect and Test the Window Motor

• With the door panel still removed, disconnect the window motor connector.
• Use a multimeter to check for voltage at the connector when the switch is pressed.
• If voltage is present, the motor may be faulty. If no voltage, troubleshoot wiring.
• To test the motor, apply direct power from the battery to the motor terminals.
• If the motor does not operate, replace it.

5. Check Window Regulator

• If the motor operates but the window does not move, inspect the window regulator.
• Remove any obstructions and check for mechanical failure.
• If damaged, replace the window regulator assembly.

6. Reassemble and Test

• Reconnect all electrical connectors and reassemble the door panel.
• Reconnect the negative battery terminal.
• Test the operation of all power windows to ensure functionality.