after headlight knob is removed how do you get the headlight switch out of dash

You have to remove the chrome bezel. It unscrews from the headlight switch If you look there will be 4 small indentations inside of the bezel where you removed the knob IF you have a big enough screwdriver you can put it in the slots and unscrew it, You may have to grab the HL switch under the dash and rock it back and forth a little to loosen it You wont be able to rock it much as the hole in the dash is keyed to prevent it from spinning

Here is a pic from Scott Drakes Website, its a Mustang, but its virtually the same thing Be careful, those bezel nuts are kinda hard to find