Guys, Im down to one wire on the Alpine stereo that Im putting in my wagon. Its the yellow wire for constant power/battery. I figured I would just run it to the fuse block. No big deal. I still have this one wire under the dash. I have no idea what its for. I dont think anyone could ID it in my other threads. Its a single brown wire. I cant test it. Ive got no engine harness in and I wouldnt know where to begin trying to get power to the fuse block. Can anyone ID this wire and plug ? Its in my 83 Malibu wagon.