1999 Buick Riviera Owner's Manual - Page 104

yellowblue To idle your vehicle with the DRL off, shift the transaxle into PARK (P). The DRL will stay off until you shift out of PARK (P). To turn off all exterior lamps at night when you are in PARK (P), turn off the headlamps and move the twilight sentinel control, located on the lower area of the headlamp switch, all the way toward AUTO MIN. When released, the spring control will return to the twilight sentinel minimum delay position, and all exterior lamps will turn off. As with any vehicle, you should turn on the regular headlamp system when you need it. To operate this feature, leave the headlamp switch off. The vehicle's twilight sentinel is always enabled. Twenty-three seconds after entering a darkened environment, the headlamps and parking lamps will turn on. If the ignition is turned on at night, the exterior lamps will come on. To turn off all exterior lamps at night when you are in PARK (P), turn off the headlamps and move the twilight sentinel control, located on the lower area of the headlamp switch, all the way toward AUTO MIN. When released, the spring control will return to the twilight sentinel minimum delay position, and all exterior lamps will turn off. If you move the control all the way to AUTO MAX, your lamps will remain on for three minutes after you turn off your engine. If you move the control toward AUTO MIN, the lamps will go off quickly when you turn off your engine. You can set this delay time for only a few seconds or up to three minutes. Light Sensor Your twilight sentinel and daytime running lamps work with the light sensor on top of the instrument panel. Don't cover it up. If you do, it will read "dark" and the headlamps will come on. Cornering Lamps (Option) The cornering lamps are designed to come on when you signal a turn. This will provide more light for cornering at night. Twilight SentinelR Twilight sentinel turns your headlamps, taillamps and parking lamps on and off by sensing how dark it is outside. The control is located on the lower area of the headlamp switch. 2-42