1996 Mercury Grand Marquis Owner's Manual - Page 137
1996 Mercury Grand Marquis Manual
Page 137 highlights
NOTE: All transmitters to be used on your vehicle must be programmed/reprogrammed at the same time. Windows Using the Power Windows Each door has a power control that opens and closes the window on that door. The driver's door has a master control panel that operates all four windows. Power windows can only be opened or closed when the ignition switch is in the ON or ACC position. RWARNING Do not let children play with the power windows. They may seriously hurt themselves. Make sure occupants are clear of the window(s) before closing. The master controls on the driver's door To lock out all window switches except the master controls, press the window lock switch once. To restore control to the individual windows, press the switch again. 134