Thanks for the info. I just bought the wife an 09 Xterra. It has the cigarette lighter which is always hot but it also has an ACC plug that is also always hot. I installed a Sirius Radio in her truck so I want it to turn on and off with the ignition so neither plug is acceptable. I purchased the aftermarket plug and ran the wire up through the existing hole in the firewall and to the fusebox. I also purchsed an ATM Add-A Circuit fuse tap(by Bussman). No matter what I connect that to, its still always hot even though I connect it to things that I know are not hot when the ignition is off and the key is out. What am I missing? To test, I also skipped the Add-A-Tap and wired directly to the fuses and still the same result.