1999 Cadillac Catera Owner's Manual - Page 107

yellowblue If you rotate the control dial all the way up, the lamps will remain on for about three minutes after the ignition has been turned to OFF or LOCK. If you rotate the control dial all the way down, the lamps will go off quickly. You can adjust the delay time from a few seconds up to three minutes. To turn the Twilight Sentinel off, press the OFF button again. The indicator light in the button will be on. This lets the driver know that the system has been turned off. The Twilight Sentinel also turns off if the ignition is turned to OFF or to LOCK. This light in the instrument panel will come on if the ignition is on and: Light Sensor The light sensor for the Twilight Sentinel is located in the center of the front defogger grille, near the windshield. If you cover the sensor, it will read "dark" and the parking lamps and low-beam headlamps will come on. D D D D the headlamps have not been manually turned on, the Twilight Sentinel senses it is dark outside, the Twilight Sentinel is OFF and the transmission is not in PARK (P). 2-45