02 cav. rr speaker wiring?

my factory rr speakers have a plug with 4 wires in it. how do i wire in my new 6x9's . sounds weak no matter which wires i use or which combination i use >>>>>>

What color are the wires??????

lt rear . yellow,brown,green with blk stripe,blue with white stripe. rt rear has blue,lite green,dark green, lite blue with black stripe.