1. Blown Fuse: Check the fuses related to the power windows in your Toyota Highlander's fuse box. If any of these fuses are blown, replace them with fuses of the same amperage.
2. Faulty Switch: The power window switches themselves could be faulty. Try operating the windows using the switches on different doors to see if it's a localized problem with a specific switch or a more widespread issue.
3. Mechanical Obstruction: Something might be obstructing the movement of the window, preventing it from operating properly. Check the window tracks and remove any debris or objects that may be causing interference.
4. Motor Issue: The power window motors could be faulty or damaged. Listen closely when operating the switches; if you hear a clicking sound but the window doesn't move, it could be a motor problem.
5. Wiring Issue: There might be a break or short circuit in the wiring that supplies power to the windows. This can be harder to diagnose and may require professional help.
6. Control Module Problem: In some cases, the window control module could be malfunctioning and causing the windows to stop working.
If you've checked all of these potential causes and the issue persists, it's recommended to take your Toyota Highlander to a qualified mechanic or Toyota dealership for proper diagnosis and repair.
