when you hook the stereo up there should be the 8 speaker wires, a red power wire a yellow power wire and a black ground, these are all you need to worry about unless your dealing with an amp than you need to run the blue wire to the amp or power antenna. any other wire should be taped off and not used unless you know what its for, on my clarion i have a solid orange which is for illumination, i dont use it and an orange with white stripe, this wire actually goes to the ebrake and enables my dvd to play but only while the ebrake is enguaged. to bypass that safty i ground out the orange /white stripe, but i dont know much about your set up, id say hook up what i mentioned and cap off the spare and see where it gets you.