What condition must the horn be in to pass inspection?

To meet the requirements for passing the Pennsylvania State Inspection, the condition of the horn is critical. The horn must be functional, meaning it should work properly and produce sound when activated. Additionally, the sound must be heard clearly to ensure that it can effectively alert other drivers, pedestrians, or cyclists in the vicinity, which is an essential safety feature of any vehicle. This requirement ensures that the horn serves its purpose of warning other road users.

While there may be specifications regarding the loudness or type of horn, the primary focus is on its functionality and clarity of sound. A factory horn is not a requirement, and a silent horn would certainly not meet the inspection criteria, as it would not provide the auditory warning necessary for safe operation of the vehicle.