Ford 1996 Taurus Manual page 128

Programming your own entry code
You can program a personal code to unlock
your vehicle with the keypad. This code does
not replace the permanent code that the
dealership gave you. Use your personal code in
the same manner as you would your original
code.
To program your own code:
1. Select five digits for your personal code.
2. Enter the permanent code that the dealership
gave you.
3. Within five seconds, press 1/2.
4. Within five seconds of pressing 1/2, enter
your personal code, pressing each digit
within five seconds of the previous digit.
The keyless entry system registers this
second code. To open your vehicle, you can
now use either code. The module remembers
only one personal code at a time. Entering a
second personal code will erase the first,
replacing it with the new second one.
To erase your personal code:
1. Enter the original permanent code.
2. Press 1/2 within five seconds of Step 1.
3. Wait six seconds.
The keyless entry system automatically
erases your personal code. The system will
now only respond to the permanent code.
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