I may be wrong here but I believe that there is a button on the switch itself. You reach under the dash and snake your hand up to the side of the switch and push the button in while you jimmy the knob and stem out of the switch with your other hand. I have changed out switches on lots of cars and trucks so it is hard to remember. My Demon is in the body shop or I would look for you. I will try to find a switch in my stash and double check.