FORD 2003 Expedition v.4 - Manual (Page 214)

The air suspension shut-off switch is
located behind two access panels on
the left rear quarter trim panel, near
the liftgate. To remove the first
panel, turn the control
counterclockwise and remove the
panel.
On vehicles equipped with
air suspension, turn the air
suspension and the ignition switch
off prior to jacking, hoisting or
towing your vehicle.
To remove the second panel, press
the tab down to unlock the access
panel.
Driving
214