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.
When the remote keyless entry (RKE) keypad illumination is activated, the vehicle security module supplies voltage to circuit 66 (LB) to illuminate the RKE keypad. The RKE keypad illumination is grounded through circuit 57 (BK).