Symptom Tests: Notes
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2001 Ford Pickup, 2001 Ford F550 Super Duty, 2001 Ford F450 Super Duty, 2001 Ford Excursion, and 2001 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Always check module power and ground circuits prior to replacing a control module. See DATA LINK CONNECTORS, GROUND DISTRIBUTION or POWER DISTRIBUTION article in WIRING DIAGRAMS.