Illumination control
WARNING: This page is about a different car, the 2005 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
The unified meter control unit outputs the speedometer, odometer/trip meters, tachometer, oil pressure gauge, voltage gauge, A/T indicator, fuel and temperature gauge lighting when the ignition switch is turned on. When the lighting switch is turned on, the illumination control switch can be used to adjust the brightness of the combination meter illumination and the odometer/trip meters and meter illumination.