FORD 1999 F-150 - Manual (Page 128)

FOUR-WHEEL DRIVE (4WD) OPERATION (IF EQUIPPED)
When Four–wheel drive (4WD) is engaged, power is supplied to all four
wheels through a transfer case. 4WD power can be selected when
additional driving power is desired.
If equipped with the Electronic Shift 4WD System, and the
instrument panel control is moved to 4WD Low while the vehicle
is moving, the system will not engage and no damage will occur to
the 4WD system.
All utility-type vehicles and 4WD vehicles have special design and
equipment features to make them capable of performing in a wide
variety of off-road applications. Specific design characteristics give them
higher centers of gravity than ordinary passenger cars.
Utility and four-wheel drive vehicles are not designed for
cornering at speeds as high as passenger cars any more than
low-slung sports cars are designed to perform satisfactorily under
off-road conditions. Avoid sharp turns or abrupt maneuvers in these
vehicles.
4WD operation is not recommended on dry pavement. Doing so could
result in difficult disengagement of the transfer case, increased tire wear
and decreased fuel economy.
4WD system indicator lights
The 4WD system indicator lights illuminate only under the following
conditions. If these lights illuminate during normal driving, have your
vehicle serviced.
• 4X4 —illuminates when the
ignition is turned on or when 4H
(4WD High) is selected.
• LOW RANGE —illuminates
when the ignition is turned on or
when 4L (4WD Low) is selected.
Using lever-operated 4WD system (if equipped)
2H (2WD High) – Power to rear axle only.
4H (4WD High) – Power to front and rear axles.
4x4
LOW
RANGE
Driving
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