2000 Pontiac Bonneville Owner's Manual - Page 110

Rear Reading Lamps Inadvertent Power Battery Saver This feature is designed to protect your vehicle's battery against drainage from the interior lamps, trunk lamp, glove box lamp or cigarette lighters. When the ignition is turned off, the power to these features will automatically turn off after 10 minutes. Power will be restored for an additional 10 minutes if any door is opened, the trunk is opened or the courtesy lamp switch is turned on. To restore power back to the cigarette lighters the ignition must be turned back to RUN. Battery Load Management The rear reading lamps will come on as courtesy lamps when you open any of the doors while it is dark outside. They will also come on as part of the interior lighting features listed previously. To turn on a reading lamp when the doors are closed, press either switch. Press it again to turn the lamp off. The battery load management feature is designed to monitor the vehicle's electrical load and determine when the battery is in a heavy discharge condition. During times of high electrical loading, the engine may idle at higher revolutions per minute (rpm) than normal to make sure the battery charges. High electrical loads may occur when several of the following are on: headlamps, high beams, fog lamps, rear window defogger, high blower fan, heated seats and engine cooling fans. 2-46