What type of lighting must be operable for a vehicle to pass inspection?

For a vehicle to pass inspection in Pennsylvania, it is crucial that not only the headlights but also the taillights, turn signals, and brake lights are operable. This requirement ensures that a vehicle is visible and can communicate effectively with other drivers on the road. Each of these lighting components serves a vital purpose: headlights illuminate the road ahead, taillights signal the vehicle's presence to those behind, turn signals indicate the driver's intent to change lanes or make turns, and brake lights signal when the vehicle is slowing down or stopping.

Ensuring all these lights are functioning enhances safety and compliance with traffic laws. When any of these lights are not operational, there is an increased risk of accidents due to diminished visibility or failure to signal intentions to other drivers. Thus, a vehicle will not pass the inspection if any one of these essential lights is malfunctioning, reinforcing the importance of comprehensive functionality in vehicle lighting for safe operation.