W126 passenger seat help needed

[MS Fowler]

I am still working on the electric seat controls for my 1982 300SD. Upon getting a good connection, the power leads, both the red and the red/white had voltage. I have continuity on every wire from the switch to the seat connector. Before installing the seat, I tested every fuction by applying 12V to each wire pair, and the reversing polarity to verify reverse function.
Sill, I have no function from the rear half of the switch--the rear rise and fall and the recline.
What have I missed?