FORD 2003 F-550 v.2 - Manual (Page 129)

• is operated by a rotary control located on the instrument panel that
allows you select 2WD, 4x4 High or 4x4 Low operation.
• uses auto-manual hub locks that can be engaged and disengaged
automatically based on the 4x4 mode selected.
• auto-manual hub locks can be
manually overridden by rotating
the hub lock control from AUTO
to LOCK if desired.
• automatic operation of the
hub locks is recommended, and
will increase fuel economy
• For proper operation, make
sure that the arrow and the
indicator dot on the hub are
aligned, and that both hub
locks are set the same (both
set to AUTO or both set to
LOCK).
4WD system indicator lights
The 4WD system indicator lights illuminate only under the following
conditions. If these lights illuminate when driving in 2WD, contact your
Ford dealer as soon as possible.
• 4x4 - momentarily illuminates
after the engine is started.
Illuminates when 4H (4x4 High)
or 4L (4x4 Low) is engaged.
• LOW RANGE – momentarily
illuminates when the ignition is
turned to the ON position.
Illuminates when 4L (4x4 Low) is
engaged.
Using a manual 4WD system (if equipped)
Note: Some noise may be heard as the 4WD system shifts or engages.
This is normal.
2H (2WD High) – For general on-road driving. Sends power to the rear
wheels only.
4H (4WD High) – For winter and off-road conditions. Sends power to
front and rear wheels.
4x4
LOW
RANGE
Driving
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