CAUTION:
1. Disconnect both the negative cable and positive cable from the battery.
2. Remove the dashboard lower cover (see page 23A64).
3. Disconnect the 5-P connector from the under-dash fuse/relay box, and disconnect the 7-P connector from the main wire harness.
4. Remove the steering column covers.
5. Insert the key, and turn it to "0".
6. Remove the two screws, and replace the switch.