1997 Mercury Grand Marquis Owner Guide 1st Printing - Page 113
1997 Mercury Grand Marquis Manual
Page 113 highlights
Programming Your Own Entry Code You can program a personal code to unlock your vehicle. This code does not replace the permanent code that the dealership gave you. Use your personal code in the same manner as you would your original code. To program your own code: 1. 2. 3. 4. Select five digits for your personal code. Enter the permanent code that the dealership gave you. Within five seconds, press 1/2. Within five seconds of pressing 1/2, enter your personal code, pressing each digit within five seconds of the previous digit. Five seconds after you press the fifth digit, your door lock system will lock and unlock the vehicle doors to confirm successful programming. The keyless entry system registers this second code. To open your vehicle, you can now use either code. The module remembers only one personal code at a time. Entering a second personal code will erase the first, replacing it with the new second one. To erase your personal code: 1. 2. 3. Enter the original permanent code. Press and release 1/2 within five seconds of Step 1. Press the 1/2 button a second time and hold for two seconds. The keyless entry system automatically erases your personal code. The system will now only respond to the permanent code. 112 5.