I want to wire the rear Cigarette plug to always be hot. Want to have it hot all the time without having to turn on to the Acc. key position. I wired 12 volts to the cigarette post on the fuse holder, but found out there is also some kind of solenoid (as you can hear it click when voltage is added) same solenoid also clicks when turning the acc. on. So it supposed to be on the circuit. Just wondering what it's for. As it draws 150mah. If somebody has a picture where the rear cigarette wire can be cut and rewired I'd appreciate it.