Tail lights and dash lights are out

Hi Jeffrey,

Most likely to be the lighting control logic board, inside the pod on the left of the steering wheel.
The board lives in that black housing through which the headlight switch is also mounted and has the fog light switches on the board also so that they poke out of the top when the board it in place.
To access the board take out the one Phillips screw directly underneath that left side pod and the bottom panel comes off, the board then un-clips (2 spring plastic clips at the far end near the dash clocks, one near to you, ease them back and you will feel the board come loose ) , and drops out, pull off the light switch knob and undo the nut around the switch to allow you to gently ease the switch shaft back through it's hole and remove it with the board, unplug and replace the complete board unit and the main light switch which is attached to this board by its wires, put the switch back in and nut back on that first, then ease the board back into its housing until the clips click, replace the bottom pod cover with the screw and you are done, takes about 15 minutes tops.

Hope this helps
any further questions post them here and I will see them
regards
Tim.

Source, 20 years in business repairing nothing but Jaguars.