So a few days ago I bought a 2012 Impala LT and I'm loving it. That being said, I like my music as much as the next person and unfortunately, the previous owner broke the aux port on the radio. I have a bluetooth/fm transmitter that I'm using but I was wondering, do any of the power ports turn on on ignition? Or are they all always on? My fm transmitter has an on/off switch, but I noticed that the blue lights near the port (on the device) stay on even when its off which means it still draws current. I would like to leave it plugged in all the time but I don't wanna drain my battery. Any help?