Disconnect the negative battery cable from the battery. For non-air conditioned models, remove the two screws securing the left-hand air vent control cable bracket and drop the cable and bracket down. Remove the two screws securing the fuse panel and move the fuse panel aside. Pull the headlamp switch to the On position. Reach under the instrument panel and press the knob release button to remove the knob and shaft assembly. Remove the switch retaining nut and partially take out the switch from the instrument panel. Disconnect the electrical connector from the switch and remove the switch. Installation is the reverse of removal.