For early models, start by disconnecting the cable from the negative battery terminal. Next, remove the knob on the switch by reaching under the dash and pressing the shaft lock tab while pulling the knob and shaft away from the cluster panel. Then, take off the steering column shroud and remove the screws securing the top of the instrument cluster finish panel to the dash before taking off the finish panel. Unscrew the headlight switch mounting nut, remove the switch from the panel, and disconnect the wiring connector from the switch. Installation follows the reverse order of removal, without needing to push the knob lock tabs when reinstalling. For later models, begin by disconnecting the cable from the negative battery terminal. Unsnap the right and left moldings by carefully prying at the notches on the bottom. Use a hooked tool to remove the headlight knob by depressing the spring inside it, then remove the exposed screws under the moldings. Unsnap the instrument cluster finish panel by starting at the lower clips and then the upper clips, disconnect the wiring attached to the finish panel, and remove the panel. Remove the switch pushrod by inserting a punch or similar tool into the switch access hole while pulling the rod from the switch. Unscrew the switch molding nut and pull the switch out through the rear of the dash, disconnect the switch wiring harness, and remove the switch. Installation is the reverse of removal.