Table of Contents
Power window failures are a common issue in many Subaru vehicles, often caused by malfunctioning or failed window motors. Diagnosing these problems accurately can save time and money, and help ensure your vehicle remains comfortable and functional.
Signs of a Faulty Power Window Motor
Before diagnosing the motor itself, look for these common signs:
- The window does not move when the switch is pressed.
- Unusual noises such as grinding or clicking when attempting to operate the window.
- The window moves slowly or only partially.
- Intermittent operation of the window.
Tools Needed for Diagnosis
Gather the following tools to assist in diagnosing the motor failure:
- Multimeter
- Screwdriver set
- Test light or voltage tester
- Replacement motor (if needed)
Step-by-Step Diagnostic Process
Follow these steps to identify if the power window motor is at fault:
1. Check the Fuse
Locate the fuse box and inspect the fuse related to the power windows. If the fuse is blown, replace it and test the window again.
2. Test the Switch
Use a multimeter to check if the switch is sending power to the motor when pressed. If not, the switch may be faulty.
3. Check Power at the Motor
Disconnect the motor and use a multimeter to test for voltage at the motor connector when the switch is activated. If voltage is present but the window doesn’t move, the motor may be defective.
Replacing the Power Window Motor
If diagnosed as faulty, replacing the power window motor involves removing the door panel and disconnecting the old motor. Follow your vehicle’s repair manual for specific instructions. Installing a new motor should restore window operation.
Conclusion
Diagnosing power window motor failures in Subaru vehicles requires systematic testing of the fuse, switch, and motor. Proper diagnosis ensures you replace only the faulty component, saving time and expense. Regular maintenance and prompt repairs can keep your power windows functioning smoothly for years to come.