1997 Mercury Grand Marquis Owner Guide 1st Printing - Page 114

Do not set a code that presents the numbers in sequential order, such as 1/2, 3/4, 5/6, 7/8, 9/0. Studies show that people who idly press the buttons usually press a sequential pattern. Also, do not select a code that uses the same button five times. Thieves can easily figure out these types of codes. Your door lock system will lock and unlock the vehicle doors to confirm successful erasure. The system will now only respond to the permanent code. Battery Saver When the ignition is turned off, the vehicle will turn off battery voltage to the vehicle lamps as follows: u Courtesy lights (lights which come on when a door is opened): after 10 minutes. lamps: after 30 minutes. u Map/Glove compartment/Trunk/Hood u Headlamps/Park lamps (only if headlamp switch is left in Headlamp position): after 10 minutes. This will prevent draining of the battery if those lights have been left on inadvertently or if a door is not completely closed. Battery voltage to these lamps will be restored when the keyless entry keypad is used, the remote entry transmitter is used, any door is opened, the trunk is opened, or the ignition key is turned to the ON position. 113