87 5.0 radio problem, help please.

I am hoping to get some advice or any help as to what may be causing my problem. A few weeks back, I went to the junk yard to get a new passenger side visor (with the light in it). I pulled the old visor out, disconnected the wire for the light, and swapped the new (junk yard) visor. I connected the wire to power the light. When I turned the car on to leave the junk yard, my radio and dome light no longer worked. I checked the fuses and none are blown. I then swapped the old visor back on, but still no radio or dome light. Could I possibly have bumped a ground loose in the passenger side visor area? Aside from checking the fuses, I'm not sure where to start, and I don't want to start ripping things apart for no reason. Also, my gauge cluster still lights up. Any input would be greatly appreciated.