Disconnect the wire from the negative battery terminal.
Remove the steering wheel.
Turn away screws and remove the top and lower casings of a steering column.
Remove the ignition switch retaining ring.
Remove the ignition switch lamp and (if it is needed) steering column tilt lever.
Loosen the ignition switch clamp screw.
Raise the installation tab of the combination switch, then pull the switch off the steering column.
Disconnect the connectors from the switch.
Installation is carried out in the reverse order of removal.