1997 Buick Century Owner's Manual - Page 119

Twilight Sentinel Twilight Sentinel provides a period of exterior illumination as you leave the vicinity of your vehicle. The feature is activated when your vehicle's headlamps are on due to the automatic headlamp control feature described previously in this section, and when your vehicle's ignition is turned off. Your headlamps will then remain on until the headlamp switch is moved from OFF to the parklamp position or until a 90 second illumination period has elapsed. If you turn off the ignition with the headlamp switch in the parklamp or headlamp position, the Twilight Sentinel cycle will not occur. You can customize the vehicle to activate the Twilight Sentinel when your vehicle's ignition is turned off under the conditions described above, or may choose not you to activate this featureunder any conditions. The enabled/disabled stateof this feature will be toggled when you perform the following sequence with the doors closedand the ignition key in the RUN position: Press and hold the power door lock switch. While holding the door lock switch, cyclethe headlamp switch on and then off two times. Release the power door lock switch. These operations must be carried out in a time period of less than 10 seconds, followedby a delay period of no more than 10 seconds. Then, press and hold the power door unlock switch. While holding the door unlock switch, cycle the headlamp switch on and then off two times. Release the courtesy door unlock switch. These operations must be carried out in a time period of less than 10 seconds. After releasing the door unlock switch, a single chime will be heard if the Twilight Sentinel function has been disabled; two chimes will be heard if the feature has been enabled. This feature will be enabled when your vehicle is shipped from the factory. Disconnecting the vehicle's battery for up to a yearwill not change the programmed operation of this feature. 2-43