Ford 2004 Expedition Owner's Manual page 222

Driving
Positions of the Control Trac system
The Control Trac system functions
in four modes:
• 2H (2WD HIGH) delivers power
to the rear wheels only. This is
appropriate for normal on-road
driving on dry pavement.
• A4WD (4X4 AUTO) provides
electronic control four-wheel
drive with power delivered to all
four wheels, as required, for
increased traction. This is appropriate for all on-road driving
conditions, such as dry road surfaces, wet pavement, snow or gravel.
• 4H (4X4 HIGH) provides mechanically locked four-wheel drive power
to front and rear wheels. The "4X4 HIGH" light will illuminate in the
instrument cluster when this position is selected. This position is not
recommended for use on dry pavement. This position is only intended
for severe winter or off-road conditions, such as deep snow, ice or
shallow sand.
• 4L (4X4 LOW) provides mechanically locked four-wheel drive when
extra power at reduced speeds is required. The "4X4 LOW" light will
illuminate in the instrument cluster when this position is selected.
This position is not recommended for use on dry pavement. Use this
position for off-road low-speed operation or when extra power is
required, such as climbing steep grades, going through deep sand or
pulling a boat out of the water.
Note: If your vehicle is equipped with AdvanceTrac , the
AdvanceTrac system will automatically turn off the stability
enhancement feature when you shift the Control Trac A4WD system into
4L (4X4 LOW). The brake traction enhancement feature will still be
enabled.
The AdvanceTrac stability enhancement system can be turned off
manually by pressing the AdvanceTrac
Stability Enhancement System in this chapter) while operating in 2H,
A4WD or 4H while driving in deep sand, very deep snow or more
strenuous off-road maneuvers. This will disable the engine management
feature, allowing the vehicle to maintain full power and enhanced
momentum through the obstacle.
222
2004 Expedition (exd)
Owners Guide (post-2002-fmt)
USA English (fus)
button (refer to AdvanceTrac