1997 Buick Regal Owner's Manual - Page 122

Rearview Mirror Reading Lamps (If Equipped) Battery Rundown Protection Your vehicle has a featureto help prevent you from draining the battery in case you accidentally leave the interior courtesy lamps, reading/map lamps, visor vanity lamps, trunk lamp, underhood lamp or glove box lamps on. If you leave any of these lamps on, they will automatically turn off after 20 minutes, if the ignition is in the OFF position. The lamps won't come back on again until you: Turn the ignition on, 0 Turn the lamp switch off, then on; or Open a door. Note that if your vehicle has less than 15 miles (25 km) on the odometer, the battery saver will turn off the lamps after only three minutes. Use the switch next to each lamp to turn them on and off. Retained Accessory Power With retained accessory power, your power windows, audio system and sunroof will continue to work up to 10 minutes after the ignition key is turned to the OFF position and none of the doors isopened. Dome Lamp The dome lamp will come on when you open the doors. 2-46