ECE Regulation No. 28 sets forth the uniform provisions concerning the approval of audible warning devices (horns) and their installation on motor vehicles. Part 2 of this regulation focuses on the installation requirements for these devices. Proper installation is crucial to ensure that audible warning devices function effectively and reliably, providing essential safety signals to alert other road users.

Part 2 of ECE R28 specifies the technical standards for the installation of audible warning devices on vehicles. This includes requirements for the positioning, orientation, and mounting of the devices to ensure optimal sound projection and audibility. The regulation mandates that audible warning devices must be installed in such a way that they are not obstructed by other parts of the vehicle and that their sound can be clearly heard in various traffic conditions.

The regulation also includes provisions for the electrical connections and durability of the installation. The audible warning devices must be connected to the vehicle's electrical system in a manner that ensures reliable operation under all conditions. The installation must be able to withstand environmental factors such as vibration, temperature changes, and exposure to moisture without compromising the performance of the audible warning devices.

The TAT Lab in Iran is authorized to perform testing and certification for compliance with ECE Regulation No. 28, including Part 2 which covers the installation of audible warning devices. This includes conducting all necessary tests to ensure that the installation meets the specified standards for positioning, orientation, and durability. TAT Lab utilizes advanced testing equipment and methodologies to perform these tests accurately and efficiently. By performing these tests, TAT Lab helps enhance vehicle safety in Iran by ensuring that audible warning devices are installed correctly and function reliably, providing effective warning signals to other road users.