Sorry, can't help you too much as I don't have the Touring model. However, if there are some similarities, the switch is mounted with breakaway torque bolts. To remove them, you can either tap a groove into the top of it with a flat screwdriver (or dremel or hacksaw blade) then remove the bolts.
The switch body itself is two parts. You can remove the lower cover to inspect. It may look something like this: