Sony CDX-2250 CD Changer "ford radio volume problems" Questions

...ford ka player) has been fitted but it only plays the cd out of one speaker. the radio plays fine. When I first got my Ka, the wiring between the car and the door was snapped. If you open the door ...

...ford convertible.everything comes on except there is no volume. unhooked and rehooked 2 times. still no sound. unhooked and hooked it to a speaker I had in the garage. it worked? where is the problem ...