Each vehicle equipped with a keyless entry keypad is programmed with a 5-digit entry code. This code is provided to the customer through a wallet card in the owner literature package. In addition, this code is available through a diagnostic tool and is also printed on the vehicle security module label. When entering codes each digit must be entered within 5 seconds of the previous button press. Here is the locations of the VSM (Vehicle Security Module)
Regular cab
Remove the LR quarter trim panel.
Super Cab
Auto Technician
ASE Master Tech W/Advanced Engine Performance, Ford Senior Master Certification