One of the two wires that come down for the radio is a lead for the dimmer lights in the dash. The other wire is a switched positive for the radio. The wire for the dimmer light is for the light in the radio. Maybe you used this as a ground? I did that in a mustang about 17 years ago, didn't have any dash lights after that.
VERY old post, but i have exactly done the same thing two days ago.
Installing my custom autosound in a hurry i used the radio light wire as a ground:loco:....
Now my dash lights are out.
I have new fuse, everything else is working fine.
What did you do?...change the switch?
