Instrument panel lights.
 

I recently installed a aftermarket radio in my 1987 190E Mercedes, now I don't have dash lights.. What wire did I cut that would cause them to go out, I have checked the fuses they are appear to be fine, is there something else that controls the dash (Instrument Panel lights)..if it's a wire from the radios wiring harness which one could it be..thanks let me know if you can help..thanks..