1999 Pontiac Grand Prix Owner's Manual - Page 113

yellowblue When it's dark enough outside, your headlamps will change to full brightness. The other lamps that come on with your headlamps will also come on. When it's bright enough outside, the regular lamps will go out, and your low-beam headlamps change to the reduced brightness of DRL. To idle your vehicle with the DRL off, set the parking brake while the ignition is in OFF or LOCK. Then start your vehicle. The DRL will stay off until you release the parking brake. As with any vehicle, you should turn on the regular headlamp system when you need it. Fog Lamps The fog lamps switch is located in the upper hand corner of the instrument panel, to the left of the instrument panel cluster. To turn the fog lamps on, press the right side of the fog lamps switch. A light will glow on the switch to let you know that they are on. (The parking lamps must be on, or the fog lamps won't come on.) Press the left-hand side of the switch to turn the fog lamps off. 2-53