I just hooked up my Tekonsha P3. After I was done connecting wires, I looked at the unit and it was on without a key in the ignition. Now I just want to make sure that it's supposed to do this. Otherwise, is the truck wired incorrectly in that the 12 V power wire is always hot? Is the brake controller only supposed to turn with a key? Now the instructions do say it will turn off after 15 minutes of inactivity. I assume this is how it naturally works. I have not had it hooked up to a trailer yet.