I have a 98 chrysler concorde,. I purchased a pioneer 5000ub for it, a metra wiring harness and a metra dash kit. We had everythig ready to go, and connected the cables color to color as per the instructions, we have the mute wire left over on the head unit as well as the antenna wire on the stock wiring harness. We powered it on and all the functions work but no sound comes from the speakers. AM i supposed to connect those through rca jacks or something, i just cant figure it out.