What do lighting device inspections typically focus on?

Answer: B — Side markers and turn signals

Lighting device inspections primarily focus on ensuring that all necessary external lights on the vehicle function properly and meet safety standards. This includes checking side markers and turn signals because they are crucial for visibility and communication with other drivers. Side markers help indicate the overall dimension of the vehicle, especially in low-light conditions, while functioning turn signals are essential for safe lane changes and turning maneuvers. Ensuring these lights are operational is vital for compliance with traffic laws and to enhance overall road safety. In contrast, the other options pertain to different areas of vehicle inspection. Engine lights and dashboard indicators are more related to internal vehicle diagnostics rather than lighting device function. Brake pads and rotors focus on the vehicle's braking system rather than its lighting features. Fluid levels and air systems pertain to the vehicle’s mechanical operations, which are essential for functionality but are not part of the lighting inspection process.