1997 Cadillac DeVille Owner's Manual - Page 115

Light Sensor Exterior Lighting BatterySaver If the manualpark lamp control has been left on, the exterior lamps will turn off approximately 10 minutes after the ignition turned to LOCK or is ACCESSORY This protects draining the battery case you have in accidently left the headlamps or parking lamps If on. you need to purposely leave the lamps on for more than 10 minutes with the ignition in LOCK or ACC, turn the manual controlknob off and then back on. delay the To lamps from turning see "Twilight Sentinel" earlier off, in this section. Interior Lamps Instrument Panel Brightness Control Cluster lighting as well as instrument panel lighting it The light sensor for the DRL and the twilight sentinel is automatically dims when becomes dark outside. When it's dark, the brightness control can be manually located in the center of the front defogger grille.If you cover the sensor, will read "dark" and the lamps will adjusted. Cluster lighting and instrument panel lighting it automatically brighten when it becomes light outside. come on. 2-50