FORD 2003 F-550 v.1 - Manual (Page 113)

FOUR-WHEEL DRIVE (4WD) OPERATION (IF EQUIPPED)
For important information regarding safe operation of this type
of vehicle, see Preparing to drive your vehicle in this chapter.
Four–wheel drive (4WD) supplies power to all four wheels. 4WD should
not be operated on drypavement; driveline damage mayoccur.
If equipped with the Electronic Shift 4WD System, and 4WD Low
is selected while the vehicle is moving, the 4WD system will not
engage. This is normal and should be no reason for concern. Refer
to Shifting to/from 4WD Low for proper operation.
The 4WD system also uses hub locks that can be engaged and
disengaged based on the 4WD mode selected. Refer to Front wheel hub
locks (if equipped) for more information.
4WD system indicator lights
• 4X4 - illuminates when 4WD High
is selected.
• LOW RANGE - illuminates when
4WD Low is selected.
Front wheel hub locks (if equipped)
4x4
Driving
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