To remove an ignition lock cylinder, disconnect it from the car battery, detach the steering wheel, remove indicator switches and wipers, detach the sleeve from the steering column, remove the ignition switch and core, and then pull out the cylinder. This procedure may vary from one car model to another.
To disconnect the vehicle's battery, detach the negative cable terminal from the battery, and then loosen and remove the screws that secure the steering wheel column covers, and set them aside. To remove the steering wheel, pull the center cover of the steering wheel, and lift the wheel. Detach the horn wires, unscrew the retaining nut and washer from the steering wheel, and then pull the steering wheel out of the shaft.
Once the steering wheel is out, pull away the indicator switches and windscreen wiper, and then slide up the spacer sleeve to detach it off the steering column. Loosen and remove the screws that mount the ignition switch onto the ignition system, and pluck out the switch. Detach the connector wires from the switch, and set it aside.
To remove the ignition switch core, insert the core key into it, and press the retaining pin with a screwdriver while turning off the key until the lock cylinder releases from its cover. Then slowly pull out the key to remove the cylinder from its casing.