FORD 2003 Explorer v.3 - Manual (Page 94)

1. Turn the ignition key to ON, then
press the UNLOCK button 3 times.
2. Turn the ignition key to OFF,
then press the UNLOCK button 3
times.
3. Turn the ignition key to RUN; the
horn will chirp once to confirm
programming mode is entered.
4. Press the UNLOCK button and then the LOCK button. The horn will
chirp once to verify that the autolock feature has been disabled, or chirp
twice to indicate the system has been enabled.
5. Turn ignition to OFF to exit programming. A horn chirp will follow to
verify the system has been enabled/disabled.
Locks and Security
94