What must be checked for the operation of windshield wiper controls?

The operation of windshield wiper controls is crucial for ensuring visibility during adverse weather conditions, such as rain or snow. When assessing the wiper controls, the primary concern is whether the wipers function properly, which includes being able to activate them, switch between settings, and ensure they clear the windshield effectively. This functionality is vital for the safety of the vehicle occupants as it directly impacts the driver's ability to see the road clearly.

While aspects such as the visual condition of the wipers and whether they have multiple speeds can be important, the fundamental requirement is that the wipers must be operable. If the wipers do not function correctly, the ability to maintain visibility is compromised, which could lead to dangerous driving conditions. Therefore, confirming that the wiper controls are operable is the key focus of the inspection.