Why do Toyota Prius power windows stop working suddenly, and how can this issue be diagnosed?

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Why do Toyota Prius power windows stop working suddenly, and how can this issue be diagnosed?

Many Prius owners experience sudden power window failure, either on one side o r all four windows.
Could this be due to a blown fuse, faulty window motor, o r a weak 12V battery?
How can owners troubleshoot and fix this issue without professional help?

Sandeep asked on 15 Feb 2025 12:25:46 pm

1 Answer

17 views |

Car Mechanic Expert - on 15 Feb 2025 12:32:53 pm

Common Causes:

Blown Fuse: A blown fuse is one of the most common causes of power window failure. If all windows are not working, it might be a fuse issue.
Faulty Window Motor: If only one window is not working, the motor may be faulty.
Weak 12V Battery: A low o r weak 12V battery can affect the electrical system, including power windows.

Diagnosis and Troubleshooting:

Check the Fuse: Start by inspecting the fuse associated with the power windows. If the fuse is blown, replace it.
Test the Window Motor: If only one window isn’t working, test the motor. You can use a multimeter to check for power at the motor terminals. If there’s no power, the motor may need replacement.
Test the 12V Battery: If all windows fail, check the 12V battery voltage using a multimeter. A healthy 12V battery should read around 12.6V when the car is off.