CD changer problem

I have a Sony cd changer that went out. I checked the fuses in the fuse panel but it was fine. I am afraid that I might have messed up the wiring. I'm thinking that it might have a separate fuse holder but I don't know where it is. Is it behind the receiver, or near the changer? If it is the wiring how much would it cost to rewire it or how difficult is it to do it myself?

This happened when my car died and needed a jump and the cables got put on the other car the wrong way. A wire started to smoke on my car so I hurried and disconnected the cable. The fuse to the radio blew so I am hoping it is just the fuse to the changer.