It's cold, and Senna's horn changes its voice?

Working principle of the horn: When the horn button on the steering wheel or other position is pressed, the current from the battery will flow to the electromagnetic coil of the horn relay through the loop, and the electromagnetic coil will attract the moving contact switch of the relay to close, and the current will flow to the horn. The current makes the electromagnet in the horn work, making the diaphragm vibrate and make a sound. Horn failure inspection: in a very