1996 Mercury Grand Marquis Owner's Manual - Page 112

Rear Courtesy/Reading Lamps (If equipped) Your vehicle may be equipped with a courtesy/reading lamp located at the rear-center of the headliner (roof). The right lamp is for the right side passenger and the left lamp is for the left side passenger. Rear seat courtesy/reading lamps (optional) With the lens in the flat position, the courtesy/reading lamp will illuminate when any door is opened or when the headlamp dimmer knob is rotated to the courtesy lamp position. With the lens in the rotated position and the key in the ON or ACC position, the courtesy/reading lamp will illuminate. Cleaning the Interior Lamps Your interior dome lamps and map lamps are plastic and should be cleaned with a mild detergent diluted in water. Rinse them with clear water. 109