In the power supply circuit of most of the electrical equipment of the car, except for emergency, sound and light alarms, interior lighting, side light, brake signal. burglar alarm and electric door locks, the voltage is supplied through the ignition switch. To improve the anti-theft properties of the car, the switch is combined with the lock, so this device is often called the ignition switch.
The lock body is attached to the steering column with four special bolts with detachable heads. At a certain tightening torque of the bolts, the heads come off, and after that it becomes impossible to unscrew the bolts with wrenches.
The ignition lock is additionally equipped with a steering shaft lock mechanism. After removing the key from the lock, the spring-loaded latch is released. When you try to turn the steering wheel latch fixes the steering shaft from turning.