1. Remove the fuse access panel found to the left of the switch at the side of the dash. You will see a black screw, upper right, remove it.
2. Under the steering wheel where it meets the dash you will see one exposed silver screw. Remove it and the trim piece it was holding in place can now be removed.
3. With the centre trim piece now removed, two additional screws to the left and right are now exposed. Remove them.
4. Looking under the dash you will find three or four additional screws that need to be removed. These screws can be found on the forward edge of the cover. Likewise, at the rear you will find two additional screws that only need loosening, not removed.
5. The under cover will now drop down by just pushing it back to allow the two rear screws (the ones you loosened earlier) to pass through a larger hole that when done, releases the entire cover. It will simply drop down in your hands.
6. The Headlight Switch drops down with the cover as it is attached by two small black screws. It will be obvious when looked at.
That's pretty much it. Release the four harnesses from the back and you have the switch in your hands.
7. Assembly is done in reverse.

Hope this helps.