FORD 1999 F-550 v.1 - Manual (Page 129)

• automatic hub locks can be
manually overridden by rotating
the hub lock control from AUTO
to LOCK.
Manual 4x4 system (if equipped)
The 4WD system is engaged or
disengaged by rotating the front
wheel hub lock control from FREE
to LOCK, then manually engaging
the transfer case with a
floor-mounted shifter.
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 and when
4H (4x4 High) is selected.
• LOW RANGE –illuminates when
the ignition is turned on or when
4L (4x4 Low) is selected.
Using a manual 4WD system (if equipped)
2H (2WD High) – Power to rear axle only.
4H (4WD High) – Power to front and rear axles.
N (Neutral) – No power to either axle.
4L (4WD Low) – Power to front and rear axles at reduced speed.
4x4
LOW
RANGE
Driving
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