What is required for windshield wipers to function properly during inspection?

Windshield wipers are a vital part of vehicle safety, especially during adverse weather conditions. For wipers to function properly during an inspection, they must effectively clean the windshield without leaving streaks. Streaks can hinder visibility and therefore compromise safety, as they can obscure the driver's view of the road and potential hazards. The requirement ensures that the wipers are not only moving but doing so in a manner that guarantees clear visibility, which is crucial for safe driving.

While wipers do need to be installed properly and may have length specifications, the primary focus during an inspection is their ability to clean effectively. This makes the ability to clean without streaks the most critical criterion for determining their proper function. Matching manufacturer's specifications and being installed in pairs ensure functionality but do not directly assess the effectiveness in providing clear visibility.