Normal Operation
WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle security module monitors circuits 121 (YE/BK), 122 (YE), and 123 (RD). The vehicle security module receives the correct keypad code. The vehicle security module then sends voltage through circuits 163 (RD/OG) and 118 (PK/OG) to unlock all the doors. The vehicle security module monitors circuits 122 (YE), and 123 (RD). The vehicle security module receives the signal on both circuits at the same time. The vehicle security module then sends voltage through circuit 117 (BK/PK) to lock all the doors. The power door lock actuators operate in either the lock or unlock direction based on which circuit(s) are supplying voltage.