I have a P.A. PEG-70 Preamp in my setup, "it was professionally installed by some idiot, the previous owner told me three years ago." I am installing a new jensen head unit, in place of the stock Clarion shit one that came with the supra audio package. I have no clue what is going on now, I'm lost with it, the preamp has I think four wires, 12v constant, 12volt turn on, ground, and a orange wire, the orange wire was connected to the old radio, but I don't know what it's for. It can't be a remote turn on, ugh fml. Anybody have any input on this? Thanks.