Question

40.) the windshield wipers do not work, but there is a humming noise coming from the motor. the technician should check
ca. for washer pump operation.
cb. the wiper switch wiring.
cc. for a binding wiper transmission.
cd. the wiper motor connections.

Explanation:

• Option A: The washer pump operation is not related to the wiper motor humming noise and wiper not working issue.
• Option B: The wiper switch wiring might be an issue, but if there is a motor humming noise, it is more likely a mechanical or transmission - related problem rather than just a wiring issue at the switch.
• Option C: A binding wiper transmission can cause the wipers not to work while the motor still tries to operate (resulting in a humming noise). This is a likely cause.
• Option D: If the wiper motor connections were bad, there might not be a humming noise from the motor at all.

Answer:

C. for a binding wiper transmission.