Why do some cars have flashing lights inside?

[McHolden]

The flashing light inside a car is an anti-theft indicator. Its function is: when the driver locks the doors using the remote control after exiting the vehicle, the flashing light indicates that the car's anti-theft system has been activated. The car anti-theft system refers to a system designed to prevent the theft of the vehicle itself or items inside it. It consists of an electronically controlled remote or key, electronic control circuits, alarm devices, and actuators. The main types of electronic anti-theft systems are: 1. Key-controlled type: The system is armed or disarmed by using the key to lock or unlock the doors. 2. Remote-controlled type: The system can remotely lock or unlock the doors, meaning it can remotely arm or disarm the car's anti-theft system. 3. Alarm type: When the car is stolen, this system only sounds an alarm without preventing the vehicle from moving. 4. Anti-theft alarm with vehicle immobilization: In case of theft, besides sounding an alarm, this system also cuts off the car's starting circuit, ignition circuit, or fuel supply to prevent the vehicle from being moved.