How do you change the ignition on a 94 Marquis?

To change the ignition on a 1994 Mercury Marquis, first disconnect the negative battery cable to ensure safety. Remove the steering column cover by unscrewing the screws and gently prying it apart. Then, locate the ignition switch, disconnect the wiring harness, and unscrew the ignition lock cylinder. Replace it with a new cylinder, reassemble the steering column, and reconnect the battery.