1997 Lincoln Mark VIII Owner's Manual - Page 134

Coded Key Anti-Theft System Your vehicle is equipped with a coded key anti-theft system, you can only use an electronically coded key to start the vehicle. During each vehicle start sequence, the coded key is read by the anti-theft system. If the key's ID code matches that in the anti-theft system, the vehicle is enabled to start. If the key's ID code does not match the anti-theft system, or if no coded key is detected, then the vehicle is not able to start. Your vehicle was equipped with two electronically coded keys. The coded ignition key is larger than normal due to the electronics located in the head of the key. Additional spare keys, maximum of eight, can be purchased either through your dealership or selected retailers. Be sure to purchase only coded keys with a Ford or Mercury logo on it to ensure proper functionality. If both supplied keys are lost or stolen, the vehicle must be brought to the dealership for re-initialization. (All keys must be brought to the dealer, if any.) Theft Indicator The indicator pprovides system proveout and operating status. The system activates the indicator when the ignition switch is placed in the ON or START position. This indicator helps to determine possible fault conditions and/or normal operating proveout. The system will illuminate the indicator for three seconds then go out to acknowledge normal operating conditions. If the indicator does not illuminate at key ON or flashes, have the system serviced. 129