i just installed some RSd's in my car and they are currently running off my head unit. I ran speakers wire from the amp in my trunk to behind the head unit where i connected the speaker wire to the wires running to the speakers. When i turn the car on, i get no sound from the speakers, but the really wierd thing is, the rear speakers dont have any sound coming from them either, and they were still connected to the head unit. I have rcas running from all three outputs on the back of the cd player becuase i am going to eventually use them all.
The car is a 2002 Buick Century. Someone sadi that maybe i have an OEM amp somewhere....