Drivers seat has 16 way switch/movement.
All the adjustments work apart from the rear of the seat base up/down movement
It did work but now when I move the switch to move the rear part of the seat up or down I just hear a click.
It sounds like the motor is trying to move but somethings jammed

I'm presuming it's a seat out job to investigate this
Anybody had experience of this or a similar problem?

 

I have this too, 2004 XJR would love to know.

 

YES .... You have to remove the seat.
At the rear of the jack screw for the up/down motor for the rear of seat base is a "STOP" screw with a large thick flat stop washer.
Mine broke off and a part of the threads were still jammed in the end of the jack screw shaft; since the stop screw is now off the jack screw, the jack screw nut that's attached to the pivot arm will go off the end of shaft and jam up. Mine was messed up so bad I could not repair it so I went to a local jag junkyard and bought a whole seat for $150 and removed the pivot arm nut and jack-shaft assembly that I needed and replaced my broken one. Been working great for over a year now! Once you remove your seat rail bolts and the rear jack screw cover you can tilt the seat forward and see this broken bolt very easily. Might be able to use a mirror to check it out first but not sure.
Junk yard would not mess with selling me seat parts so their deal was you gotta buy the whole seat if you want any parts off it. They wanted $200 but they tested the motor and it did not work so I talked them down to $150 since I just needed the jack-shaft and pivot nut. Not a bad job ,,, but that damn seat is heavy; be careful with your back. I'm 65 so I got help to lift out.

 

Thanks for the reply
I have a good idea how to tackle this now