During a walk-around inspection, which part should NOT be checked at the front of the vehicle?

During a walk-around inspection, it is essential to check various components to ensure the vehicle is safe and roadworthy. The horn system, while important for signaling and safety, is typically not something that is directly inspected at the front of the vehicle during this specific phase of the inspection. Instead, you would focus on more visible and critical components such as the front axle, which supports the vehicle's weight and stability, the lights that ensure visibility and communication with other drivers, and the windshield for any damage that could impair vision.

The horn system usually involves an audible test that can be done from within the cab rather than a visual or physical inspection from the front of the vehicle. Therefore, checking the horn system does not fit the typical criteria for a front-of-vehicle inspection, making it the correct answer for what should not be included in that specific part of the walk-around inspection.