Ford 1999 Windstar Owner's Manual page 108

Seating and safety restraints
When returning the seatback to its original position, you may experience
a slight hesitation. If so, stop pushing the seatback momentarily, then
resume. The seatback will return to its original position after the seat is
safely latched.
Your tip slide seat has been equipped with a lock-out feature which
prevents the seatback from returning to its original position until the
seat latches in the tracks. If the seat has not latched, check under the
seat and in the tracks for possible obstructions.
Adjusting the power seats (if equipped)
Never adjust the driver's seat or seatback when the vehicle is
moving.
Press control to move front or rear
of seat up and down.
Press control to raise or lower the
seat, or to move the seat forward or
backward.
Using the power lumbar support (if equipped)
The power lumbar control is located
on the inboard side of the seat.
Press one side of the control to
adjust firmness.
Press the other side of the control
to adjust softness.
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