[drb930]

The switch knob and switch holding collar come off from the front of the dash.
You then need to remove the switch from the rear of the lower dash.
To get your hand up there you will 1st need to remove the warning control unit which is held in with 2-10mm plastic nuts.
It comes out a lot easier than it looks with a good 1/4" drive metric sockets with the wobbly adapter extensions.
Loosen the box, pull it down to the area where you can get at the plugs and disconnect the 2 plugs.
The plugs have like a ratchet arm that disconnects them and remove the box.
You will now be able to get your hand up to where the headlight switch lives.
If you are on the larger size of body and or hands, you will have to remove the drivers seat 1st before any of this work.