I got the sound working today the thing that did it yesterday was the battery in the car is gone bad , and as soon as the amp god real power and the system rebooted it played sound .
But the sound was very poor and only with the high tones . And the woofer cable explaines that
so thanks a million ! As i understand the black plug is connected to the speakers, I will check tomorrow .

I have one last problem . I cant find the data cable for the Cd changer .. does anyone know where this cable is located?

The cable should be there as the changer has been mounted in this car when the waterdamage occured..