Buick CENTURY 1997 Manual page 118

Daytime Running Lamps / Automatic
Headlamp Control
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 front turn signal lamps
come on when:
0
The ignition is on,
The headlamp switch is off and
0
The parking brake is released.
When the DRL are on, only your your front turn signal
lamps will be on. The headlamps, 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 front turn signal
lamps will turn off and your vehicle's headlamps and
parklamps will turn on. The other lamps that come on
with your headlamps will also come on.
When it's bright enough outside, your headlamps will go
off and your front turn signal lamps will come on.
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, headlamps and parklamps 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.
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