Buick 1994 Roadmaster Owner's Manual page 107

To idle your vehicle with the DRL off, set the parking
brake while the ignition is in the "Off" or "Lock''
position. Then start the vehicle. The DRL will stay off
until you release the parking brake.
Rear Seat Reading Lights
These lights go on when you open the doors.
Front Seat Reading Lights
Front seat reading lights are turned on by pressing the
switch located on the rearview mirror.
To turn on the reading
lights when the doors are
closed, press the switch.
Courtesy Lights
When any 'door is opened, several lights go on. They
make it easy for you to enter and leave the car. You also
,can turn these lights on by rotating the INT light switch
to MAX.
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