The Aux wires front and rear also lighter plug are all off when the key is off
if yours is hot all the time you are connected to something other than the Aux circuit
This got a little off topic, but:
I installed the seat's power the way that Corbin's directions said to do it. Unfortunately, that's hot all the time.
The instructions said to plug the piggy-back fuse/wire into the accessory slot in the fuse box. On the 2011 C14, there is is a slot marked "5A Accessory" (I think the instruction said 7A or 10A). That's exactly what I did, hoping that it would be a switched connection. But, it wasn't and the seats ON switch can be turned on even with the ignition off.
I'm just waiting for some fool to say, "What's this?" and turn it on when I'm not around and run the battery down.