Expedition 4WD V8-5.4L SOHC VIN 5 (2005)
Four Wheel Drive Selector Switch: Description and Operation
FOUR-WHEEL DRIVE (4WD) MODE SWITCH
Typical 4WD Switch
The 4WD control module provides the PCM with an indication of 4WD Low. This input is used to adjust the shift schedule. A 5.0-volt module pull-up
indicates 4WD High or 2WD.
