1996 Cadillac DeVille Owner's Manual - Page 105

Twilight Sentinel I Light Sensor W The controlis next to the headlarnpknob. It automatically switches the lamps on and off by sensing how dark it is outside. To operate the twilight sentinel, leave lamp knob off the and move the TWILIGHT control toany position but OFF. If you move the control all way to the right, the the lamps will remain for approximately three minutes on after the ignition has been turned to OFF or LOCK the position. If you move the controlso it isjust on, the lamps will go off quickly when you turn the ignition switch outof RUN. You can adjust the delay time from only a few seconds to three minutes. The light sensor for theDRL and the twilight sentinel is located in the centerof the front defogger grille.you If cover the sensor, it will read "dark" and the lamps will come on. 2-42