My old head unit would power everything up when I plugged in faceplate/amp/eq. The only way I can run the new unit is by acc wire to a key on hot.i tried a few different ways. W/out the face plugged in, and key on,the amp/eq turn on then the H/unit powers up when face is plugged in. I want my old way-no key,just plug H/unit in and it all powers up. Pls. Help,john