FORD 2002 F-550 v.3 - Manual (Page 91)

The control is located on the outboard side of the seat cushion.
Press to raise or lower the front
portion of the seat cushion.
Press to raise or lower the rear
portion of the seat cushion.
Press the control to move the seat
forward, backward, up or down.
Using the manual lumbar support
Turn the lumbar support control
toward the front of vehicle to move
the lumbar support forward for
more direct support.
Turn the lumbar support control
toward the rear of vehicle to move
the lumbar support back for less
direct support.
Seating and Safety Restraints
91