BigBird

I took my 83 to the shop to get the heater core repaired. They had to remove the dash to get at it. Now Betty has s stopped working. She doesn't even try - no noise coming from the spare tire area. Even when I had no radio I could here her back there clicking. New stereo and had her working good before dash removed and replaced. Stereo works great and center speaker works fine. Any ideas where to look - what to check? Thanks in advance! BigBird:)