thought i would post this up here since i have performed this modification a few times on my cars... the Lincoln Town Car seats if powered have switches on the door... to use the seats in a Grand Marquis or Crown Victoria, you have to mod the seats to use seat switches...
you will need to remove your original seat and remove the existing switches
you will need to pull apart the side of existing seat to remove bracket that holds the switches
then you will have to pull the side apart of the Town Car seat to access parts
locate the same holes that the bracket used on prior seat to mount in the Town Car seat
then bolt up the bracket to the seat
i pull the seat fabric back to together and get it looking original again
then i feel for the bracket and remove fabric where seat controls mount
(you may have to remove the tilt seat switch/arm from seat)
then it is simply running the lines through the hole and screwing down the switches into bracket you installed
here are pictures below to use as diagrams...