1997 Mercury Mountaineer Keyless Entry Remote Fob Smart Key Programming Instructions
1. Turn ignition from OFF to RUN 5 times within 10 seconds, with the 5th time ending in RUN. Door locks will cycle to confirm programming mode.
2. Within 20 seconds press any button on first keyless remote. Door locks will cycle to confirm programming.
3. Within 20 seconds, press any button on second keyless remote. Door locks will cycle again to confirm programming.
4. Turn ignition to OFF. Locks will again cycle to indicate end of programming mode.