[hatzie]

I don't have Ford wiring diagrams past the 1980's.

It's fairly easy to determine what wire does what on any power seat with a power supply... benchtop AC to DC power supply or a 12v battery.

If the seat joystick is made of unobtainium you can make up a switch panel with DPDT switches wired as polarity reversing switches or just buy polarity reversing switches... 1 per motor.

As I said in my slightly private reply...

Electric seats are run by fixed magnet DC motors.
Direction of a DC motor is controlled by the polarity on the two motor wires.

The 8 way seat has four motors and 10 wires to the switch.
The 6 way seat has three motors and 8 wires to the switch.
Motor Connections;
-Track FORWARD/BACK
-Front cushion lift/drop
-Rear cushion lift/drop
-Recline up/down... ** 8 way only **
-Power + -


The track motor usually has shafts out both ends to the tracks.
The cushion tilt motors have shafts and yokes that drive scissor lift mechanisms.

I'm obviously leaving out inflatable lumbar pillows and seat heating elements but usually those are on separate connectors.