Hi all

I feel a bit silly asking this but customer came in with this vehicle saying there was a buzzer alarm when he braked. I tested it- nothing but the pads were down so replaced them. That was 2 months ago. He has just arrived with the same and as soon as you touch the brake pedal the buzzer sounds. Does anyone know what this is referring too? is it low pressure switch failure in the hydraulic brake booster or a specific fault. There are no warning lights on, and the brakes work fine. Its coming in next week for inspection but thought i would ask in case someone has had this before.