LSZ Switch (Headlight Switch)
The headlight switch is mounted on the front of the LSZ and is connected via a ribbon cable. The headlight switch provides inputs to the LSZ for the operation of the parking lights, headlights and the instrument panel dimming.
The switch is a separate component from the LSZ and can replaced as a separate part.
There is also a phototransistor located on the face of the headlight switch which provides ambient light signals. The LSZ uses these signals to adjust the instrument cluster illumination during varying ambient light conditions (i.e. entering a tunnel etc.).
There are two variations of the headlight switch, the original version contains the headlight on/off switch, the dimmer thumb wheel fog light switch (if equipped) and the phototransistor, the updated version includes an additional switch position for the RLS functions.