FORD 2005 F-150 - Manual (Page 209)

If your vehicle sustains damage to the rear bumper/fascia, leaving
it misaligned or bent, the sensing zone may be altered causing
inaccurate measurement of obstacles or false alarms.
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 dry pavement; driveline damage may occur.
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.
System indicator lights
• 4X4 HI - Momentarily illuminates
when the engine is started.
Illuminates when 4H is selected.
• 4X4 LOW – Momentarily
illuminates when the engine is
started. Illuminates when 4L is
selected.
Using a manual 4WD system (if equipped)
2H (2WD High) – Power to the rear wheels only; used for street and
highway driving. Provides optimal smoothness and fuel economy at high
speeds.
4H (4WD High) – Used for extra traction such as in snow or icy roads
or in off-road situations. Not intended for use on dry pavement.
4x4 HI
4x4
LOW
2H
4H
4L
N
2005 F-150 (f12)
Owners Guide (post-2002-fmt)
USA (fus)
Driving
209