The ignition switch in your car is a key part of the system that starts up the engine. It controls the ignition system to turn the fuel pump and spark plugs so that the car can start up.

The key is inserted into the ignition switch and turned to position 1. This starts up the starter motor which turns on the fuel pump and ignites the engine.

A lock cylinder prevents people from starting up your car without your permission by just inserting their key into your ignition switch. It is important for the security of the car and also to keep you safe.

Some cars can be started by bypassing the ignition switch, although this is not possible in most modern vehicles due to security systems. However, there are several ways to bypass the ignition switch in older cars that still use a mechanical system.

One of the most common methods of bypassing the ignition switch is by jamming a screwdriver or the blade of a scissor into it and twisting it as you would with a key. This is a popular method and is pretty easy to do, but it can be dangerous if you are not careful.

Another way of bypassing the ignition switch is by replacing it with a toggle switch that uses a push button to start the car. This can be done by a professional but is quite a technical process that could take a while to complete.