Yea I saw that. That was my last resort wire right there. In my car that's the cigarette lighter. If I use that I would not have to use another relay because I'm sure the amperage is hight enough to turn on all my amps. but im worried about overloading it if I ever need to use that for the tire pump or somthing.
Maybe I'll just put a switch on it and if I ever need to use it I can turn off all the amps so they won't get a surge or anything.
But it's really confusing me on how this radio knows how to turn on... I only found one wire going into the radio that gets a differnt voltage than when the car is off but it's only like 2.3 volts. And that won't turn on my amps