My car came with the Vinyl (Luxtec (heated)) seats witch are Miserable for any extended driving, so I found a set on Ebay, (From an S sport)
Installed the Drivers seat and everything except the Cooling seems to work good, but when I installed the Passenger's I have Nothing.
I wasn't too concerned about the Cooling, (it'd be a nice Plus) but I thought I would have at least the basic functions.
I noticed a large yellow/red wire that I don;t have in my harness, so I don;t know if I need to add that, or if I can just jumper a couple pins to get motor controls.

 

I've acquired a manual off Ebay, "Jaguar XE (X760) 2016-2018 Workshop Manual + Wiring Diagrams" (I suspect it's similar for all models, as far as schematics)
Now, my car came equipped with 8 way Heated seats and Memory for the Driver's.
In the Manual they list an 8 way Memory + Lumbar & Bolster, a 10 way Memory + Lumbar & Bolster and a 10 way Non Memory + Lumbar & Bolster.
Ok, I can work with that, but I have a pair from a 17 XF S Sport with the 10 way Memory Lumbar & Bolster (Climate) the Schematic matches up with the Passenger's seat (up to the Modules (not so much With the Driver's)).
Why would the Passenger's seat have Modules for Memory???

The Driver's seat is a perfect match from the chassis harness to the seat connectors, the Passenger is missing a 30 amp power circuit and twisted pair to the CAN bus.
I took it in for it's Annual service and had the tech attempt to Initialize the cooling circuit, but no joy ($120 latter).