1999 Buick Riviera Owner's Manual - Page 103

yellowblue D Sidemarker Lamps D Instrument Panel Lights D Interior Courtesy Lamps Daytime Running Lamps Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. DRL can be helpful in many different driving conditions, but they can be especially helpful in the short periods after dawn and before sunset. A light sensor on top of the instrument panel makes the DRL work, so be sure it isn't covered. The DRL system will make your high-beam headlamps come on at reduced brightness in daylight when: Pull the knob toward you to the first setting to turn on the parking lamps and other operating lamps without the headlamps. Pull the knob toward you to the second setting to turn on the headlamps as well as the other operating lamps. Turn the knob from left to right to control brightness of the instrument panel lights. D the ignition is on, D the headlamp switch is off and D the transaxle is not in PARK (P). When DRL are on, only your high-beam headlamps will be on. The parking lamps, taillamps, sidemarker and other lamps won't be on. Your instrument panel won't be lit up either. When it's dark enough outside, your high-beam headlamps will turn off and your low-beam and parking lamps will become active. The other lamps that come on with your headlamps will also come on. When it's bright enough outside, the regular lamps will go off, and your high-beam headlamps change to the reduced brightness of DRL. Lamps On Reminder If the headlamp switch is left on, you'll hear a warning chime when you turn the ignition off, remove the key from the ignition and open the driver's door. 2-41