ASE G1 Auto Maintenance and Light RepairElectrical/Electronic SystemsEasy
A vehicle's power window on the driver's side operates normally, but the passenger side power window does not respond to its own switch or the master switch on the driver's door. All other power accessories are working correctly. Which of the following is the MOST likely cause?
- AA faulty master power window switch.
- BA completely discharged battery.
- CA faulty passenger side window motor.
- DA blown fuse for the passenger window circuit.
Show answer & explanationAnswer & explanation
Correct answer: C. A faulty passenger side window motor.
Since the driver's side window works and other accessories are fine, the vehicle has power. If neither the individual passenger switch nor the master switch can operate the passenger window, the issue is most likely with the passenger window motor itself or its direct wiring, ruling out common power sources or switches.
Why the other options are wrong
- A. If the master switch was faulty, it would likely affect other windows or not respond to the driver's side window commands either.
- B. A completely discharged battery would prevent any power accessories from working, which contradicts the statement that other accessories are fine.
- D. A blown fuse for the passenger window circuit would prevent any operation, but the question implies the problem is specific to the motor's responsiveness, not a lack of power to the entire circuit.
Single Power Window Inoperative
When only one power window fails to operate, typically indicating a localized issue with that specific window's motor, switch, or wiring.
- Affects only one window.
- Other windows/accessories function normally.
- Points to motor, local switch, or wiring specific to that window.
Memory trick: One window stuck, not the whole house, so check its own 'engine'!