Just installed this kit on my SD last night. Drove myself nuts for three hours... turned out my alarm brain was not accepting input from key fob. It is out of warranty so I took it apart. Relays are fine and there is one IC I can replace cheaply, so we will see.
Anyway, kit works nicely for $30. I had to reverse my violets as lock would unlock the car and unlock would lock it.
It does not need the switched 12V to operate for these cars.