Ford Mustang 2001 Owner's Manual page 71

Controls and features
Please read and understand the entire procedure
before you begin.
1. Insert the first
previously programmed
4
3
coded key into the
5
ignition and turn the
ignition from 3 (OFF)
2
to 4 (ON) (maintain
ignition in 4 (ON) for
1
at least one second).
2. Turn ignition to 3 (OFF) then 2 (LOCK) and
remove the first coded key from the ignition.
3. Within ten seconds of removing the first coded
key, insert the second previously programmed
coded key into the ignition and turn the ignition
from 3 (OFF) to 4 (ON) (maintain ignition in 4
(ON) for at least one second but no more than ten
seconds).
4. Turn the ignition to 3 (OFF) then 2 (LOCK) and
remove the second coded key from the ignition.
5. Within 20 seconds of removing the second coded
key, insert the new unprogrammed key (new
key/valet key) into the ignition and turn the ignition
from 3 (OFF) to 4 (ON) (maintain ignition in 4
(ON) for at least one second). This step will
program your new key to a coded key.
6. To program additional new unprogrammed key(s),
repeat this procedure from step 1.
If successful, the new coded key(s) will start the
vehicle's engine and the theft indicator will
illuminate for three seconds and then go out.
If not successful, the new coded key(s) will not start
the vehicle's engine and the theft indicator will flash
on and off and you may repeat steps 1 through 6. If
failure repeats, bring your vehicle to your dealership
to have the new spare key(s) programmed.
70