I bought a sony car stereo cdx gt and when i tried to install it i got confused, what wires go with the cars wires?? theres like 18 car wires and 12 sony wires, i managed to get the power to work, but none of the speakers work. There are like some orange wires from the car, and no orange for the stereo. the stereo has a purple and purple black striped wire and no purple wires from the car. its a 2004 hyundai elantra by the way.