Ⅰ. Product Overview

This is CHNT brand 24V disc‑type electromagnetic electric horn, specially designed for large‑size passenger vehicles. It is supplied in matched dual‑tone set, including high‑tone model CCHB High Tone with part number 279500646 and low‑tone model CCHB Low Tone with part number 279500645. With disc‑shaped shell structure, the horn outputs clear, loud and stable sound. It is qualified for OEM matching and aftermarket replacement when original vehicle horns get damaged, aging or failure.

Ⅱ. Main Application & Usage

1. Daily driving safety warning: Remind pedestrians, other vehicles to avoid potential road risks during driving, reversing and cornering;

2. Official vehicle voice prompt: Standard safety signal notification for bus routine operation;

3. Direct replacement for faulty original horns: Fit most mainstream bus brands including Yutong, Kinglong, Higer, Ankai, Zhongtong, etc.;

4. Stable outdoor working performance: Built-in basic waterproof and dustproof structure to adapt to complex outdoor driving environments such as rainy days and dusty roads.

Ⅲ. Step-by-Step Installation Instruction

Preparation tools: Wrench, screwdriver

1. Cut off the 24V vehicle power supply first to prevent short circuit ;

2. Remove the old broken horn together with its fixing bracket on the bus;

3. Fix the new snail horn to the reserved mounting position with the matched metal bracket and bolts, ensure the horn body is firmly fastened without loose shaking;

4. Plug the exclusive dedicated wiring plug of the horn into the vehicle’s original wiring harness socket correctly, distinguish positive and negative terminals;

5. Restore vehicle power supply, press the steering wheel horn button to test sound output;

6. Adjust the installation angle properly if the sound effect is abnormal, re-tighten all bolts to finish installation.

Ⅳ. Product Advantages

1. Dual high-low tone collocation brings thick and resonant sound, strong warning effect;

2. Reinforced metal mounting bracket is anti-vibration, not easy to loosen during long-distance bumpy driving;

3. High-quality ABS shell is anti-aging, resistant to high temperature and low temperature;

4. Plug-and-play design, no extra wiring modification needed for most buses, convenient installation.