Ford 2000 Focus Owner's Manual page 76

Controls and features
If the programming procedure was
successful, the new SecuriLockT
key(s) will start the vehicle's
engine. The theft indicator (located
on the instrument panel) will light
for three seconds and then go out.
If the programming procedure was
not successful, the new
SecuriLockT key(s) will not
operate the vehicle's engine. The
theft indicator will flash on and off.
Wait at least one minute and then
repeat the procedure from step 1. If
failure repeats, bring your vehicle
to your dealership to have the
spare SecuriLockT key(s)
programmed.
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