What should be inspected regarding turn signals in a vehicle?

The selection of the requirement that the selector switch must lock in position is essential because it ensures the proper functionality and safety of the vehicle's turn signals. When the selector switch locks in place, it indicates that the driver has made a deliberate choice to indicate a turn or lane change, which is fundamental for communicating intentions to other road users.

Proper operation of turn signals is a crucial aspect of vehicle safety. If the selector switch does not lock, it may lead to unintentional disengagement of the signal, causing confusion or accidents. Therefore, assessing the locking mechanism of the selector switch is critical during an inspection to ensure that the turn signals are operational and reliable.

Other options lack comprehensive inspection criteria. Simply checking the bulb condition or the exterior light coverage does not account for the overall functionality of the turn signal system, and stating that turn signals do not require any inspection overlooks their importance in vehicle safety.