4-Wheel Drive (4WD) Control Module
WARNING: This page is about a different car, the 2003 Mercury Mountaineer and 2003 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The 4WD control module is on the UBP communications network. The 4WD control module engages and disengages the transfer case between 2WD and 4WD when more traction is required. For additional information, refer to FOUR WHEEL DRIVE SYSTEMS .