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Home >> Mercury >> 2009 >> Sable Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 417 (Interior Lighting System) >> Diagnosis And Testing >> Interior Lighting >> Principles of Operation >> Battery Saver
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Battery Saver

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The battery saver is internal to the SJB and provides automatic shutoff of the demand lamps (vanity lamps and map lamps) and interior lamps after a period of 30 minutes (10 minutes if the lights are on due to a door ajar) has elapsed in order to save battery voltage. A timer in the SJB is started when the ignition key is turned to the OFF position. When the time-out period for the lamps has elapsed, the voltage is automatically shutoff to the lamps by the battery saver. While battery saver has voltage disabled, if the ignition is turned to any position other than OFF, any door or liftgate becomes ajar or the unlock button of the remote transmitter is pressed, the battery saver will restore voltage and start the timer again. The amount of time that is required to elapse before the voltage to the lamps is shutoff is 30 minutes (10 minutes if the lights are on due to a door ajar).