Cool diagram jjrodger!
I've had mine apart to replace a broken shaft on one of the motors (had to replace the whole assembly...$350!!!).
Except for the the SRS sensors, the big module mounted under the seat cushion harnesses the power supply for the entire seat operation mechanism. There is a big harness bundle for each seat operation that plugs into the module.
I never actually replaced the broken shaft yet, but its operation would cause the seat to lean towards the passenger side...so I unplugged the harness that facilitates its operation...pending replacement of the offending motor...
