Ok Guys -- here's the 1999 Navi specific information.
I don't see anything that refers to the
exact location of this module, but there's some clues here.
See #7 - RAP Module here:
The remote anti-theft personality (RAP) module is on the ISO 9141 communication network.
The RAP module controls the remote entry, interior lamp illumination signal to the GEM and panic alarm from the keyless entry remote.
For additional information, refer to Section 501-14B.
SECTION 501-14B:
Keyless Entry/Computer Operated Locks 1999 Expedition/Navigator Workshop Manual
GENERAL PROCEDURES
Programming Remotes (FOBS)
NOTE: The keyless entry remote transmitters are reprogrammable and must be set at the same time.
NOTE: To program (or reprogram) the keyless entry remote transmitters into the RAP module, perform the following steps:
- Turn the ignition switch from OFF to RUN 8 times within 10 seconds, ending in RUN. If the RAP module has successfully entered the program mode, it will lock and then unlock all doors.
- Press any button on the keyless entry remote transmitter, and the doors will lock and then unlock to confirm that each keyless entry remote transmitter has been programmed.
- If the door locks do not respond for any keyless entry remote transmitter, wait several seconds and press the button again. If the door locks still fail to respond, refer to Diagnosis and Testing.
- Turn the ignition switch to the OFF position, or wait up to five minutes after Step 2, to exit the program mode. If a keyless entry remote transmitter has been programmed (or reprogrammed), the RAP module will lock and unlock all doors one last time to confirm.