Please be patient with this one,I have some history to go with it.
Bought a 2003 xk8 convertible with 18 k miles a few years back as a wedding present for my wife.Passenger seat never
worked,except for heat function.Driver seat always adjustable,multifunctional, but heat never worked.
Over past few weeks drivers seat had gremlins and ghosts that would trigger short adjusting functions that would eventually stop.Yesterday,put the drivers seat back to allow my 6’5” frame inside,and everything stopped working except the memory.
Today,I swapped the modules and the drivers module has brought the passenger side to life.Switched back,and the drivers side still doesn’t operate.
Pulled the seat out completely hoping for a frayed wire,no luck.
Fuse number one 20 amp on drivers side checked out.Have 12.7 volts to power resistor ,small coil under seat.
Thinking it may be switches, would like to bypass and test before picking up a set.Not sure how to bypass switches.
I have the entire seat in the back seat,laying down,so I have access to the entire underside.Thoughts on something I have overlooked? Thanks in advance.Going grayer by the minute with this one.

 

Seat module problems are well known and repairable. You will need to set the seats where needed and then send the modules for repair.
The go to guy is Darrell Turner 858-649-9090, give him a call or text and he can repair the module. He has repaired modules for my XK8 and XJ8.
He does a great job on our modules.

 

Thanks for the reply.Called mr. turner and left a message,hope to hear from him soon.Here is my dilemma,shouldn’t the good board work on the driver side as it does on the passenger side.It has the same number on the module,and when I removed from the casing,looked like new.The original passenger board was corroded and trace lines looked like those posted with same problem.

 

Given that you said the memory works, then you have to check the switches. You need to get the wiring diagram (electrical guide) for you car and start testing the switches with a multimeter, or bypass them and see if the seat moves.