FORD 2009 F-150 v.1 - Manual (Page 298)

Activating the electronic locking differential (ELD)
The ELD can be turned on by
pulling the knob on the 4WD control
toward you while the control is in
either 4H or 4L mode.
Once the knob is pulled, the light
located on the control will blink for
approximately two seconds and then
it will remain solid.
Once the light on the control
remains solid, both rear wheel axle
shafts will be locked together
providing added traction.
If the light blinks for 10 seconds, then turns off, one of the following has
occurred:
• The vehicle speed is too high.
• The left and right rear wheel speed difference is too high during an
engagement attempt.
• The system has malfunctioned and will be accompanied by a CHECK
4X4 message in the message center.
Driving off-road with truck and utility vehicles
4WD vehicles are specially equipped for driving on sand, snow, mud and
rough terrain and have operating characteristics that are somewhat
different from conventional vehicles, both on and off the road.
How your vehicle differs from other vehicles
Truck and utility vehicles can differ from some other vehicles. Your
vehicle may be higher to allow it to travel over rough terrain without
getting hung up or damaging underbody components.
The differences that make your vehicle so versatile also make it handle
differently than an ordinary passenger car.
Maintain steering wheel control at all times, especially in rough terrain.
Since sudden changes in terrain can result in abrupt steering wheel
motion, make sure you grip the steering wheel from the outside. Do not
grip the spokes.
Drive cautiously to avoid vehicle damage from concealed objects such as
rocks and stumps.
2009 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)
Driving
298