1997 Mercury Grand Marquis Owner Guide 1st Printing - Page 118

3. Press one button on each of the transmitters to be programmed. Each transmitter button must be pressed within seven (7) seconds of the prior one. Each time a transmitter is successfully programmed, all of the vehicle doors will lock and then unlock to verify programming. If the doors did not lock/unlock, your transmitter was not programmed. Additional transmitters may be purchased from your dealer (remote entry system will work with up to four transmitters). Follow the same programming procedure as above. THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION. NOTE: All transmitters to be used on your vehicle must be programmed/reprogrammed at the same time. 117