Power seats driver's power seat is not working and the cd changer in the trunk is not working

Doesn't have a fuse for power seats . Use's a circuit breaker , 25 amp circuit breaker PWR SEAT located in rear fuse box . This rear fuse box is under the back seat . Did you look under the seat to see if something is blocking the seat tracks ? Does the vehicle have memory seats ?

on the frame on the drivers side

if going backward is working,and foward is not,, easy
,1st determine what is defective-so u know what to replace/repair-2 things only ,[1-switch or 2- motor under d seat]
by presing the backward swicth,, you can hear the sound of the motor running and u can see the seat is going backward...
1-now by pressing the foward switch, and you hear the motor running but not that strong like the rear ..and the seat move an inche /a little and stop,,.then u have a defect weak motor,
2- now by pressing the foward swicth and u dont hear any motor running then the switch is most likely defective
defective switch -repair- spray contact cleaner,remove cover switch,penetrate inside
defective motor-repair-remove motor replace inside carbon,,.chiepest way not to spend to much money..
i suggest even once a month,lubricate all power seat/even not powerseat/,door hinges/.trunk door/.power antenna./ .by spraying lubricating oil,. for maintanace,..you can save a lot..

these are mostly hidden in the trunk.look for the cable to connect,
the changer in the manuel.or in car .and follow this cable .there you find the changer.at the end off the cable

Unless this is a convertible then there is no relay for the seat in the trunk. The relay is supposed to be under the driver's seat. Look for the Red wire going to the seat switch, that should be 12 volts with the key on. The brown wire should be ground. The best way to test power & ground is to use a headlight (sealed beam) & try to power that up with the power & ground going to the seat switch. What that does is make sure that there are no bad connections & you truly have good power & ground. Maxi fuse #4 powers up the seat relay.

There should be a trunk release switch in the vicinity of the driver seat. There also may be a manual trunk release somewhere in the back seat area. Also, you may be able to remove or fold down the rear seat thereby giving you access to the trunk.

first, make sure you check power seat fuse first, i remember power seat fuse right at below/front of rear seat cursion, u have remove panel at rear seat.
you can purchase any where at used park, but make sure you have check that module habe same part number. you can check part number inside drive side trunk, remove spare tire and you can see.here read this link it will help you happy holidays http://www.jaguarforums.com/forum/showthread.php?t=16455

check the trunk, the glove box, under the back seat, and the center console

not all sables had a harness for cd changer . if it had one it would be taped to harness above fuel shut off.

some relays are in the fuse panel and some are under the hood in a box.

Relays are used when high current is involved. seats and windows use relays as well as fuses. Your owner manual should say where the underhood relays are. Or call your dealer service department.