Replaced mine a few months ago, pretty easy to do.
1. Remove chrome AC vent just above switch, pulls straight out, no screws. This will expose top edge of the headlight switch bezel. (mark top of vent with tape to reinsert in same orientation later).
2. Grasp and pull off switch bezel, clips on, no screws. Snaps off, this will expose the naked switch.
3. Remove visible screws securing the switch.
4. Pull out switch enough to unclip wiring harness, should be plenty of slack.
5. Reverse to reinstall.