The two-prong contact switches your ignition-key buzzer on and off. Lift the switch straight up (dont lose the spring clip thats attached to it). To remove the ignition-lock cylinder, turn the key to Lock, insert a thin tool into the circled slot to break the casting flash, and push down to release the spring latch on the cylinder. Pull the lock cylinder out of the column. Remove the bolts that hold the ignition switch to the lower column (not shown). Dont forget to remove the washer that surrounds the steering shaft. Now remove the four bolts (arrows) and lift the entire housing out of the column.