sidecar

I took my 2005 ram 2500 pickup in for airbag recall repairs. When I got it back my radio didn't work. It had power (digital garbage flashed on the display), but no play. The dealership I took it to said it must be a coincidence, that they never touched that area. I went to a junk yard for a used radio but the two they had wouldn't work either but one worked just before they removed it from a wrecked truck. After trying the two radios now my electric door locks don't work, not even my key fobs.
I checked all my fuses in the case but none were bad. Are there hidden fuses that would affect both radio and locks? Yes all plugs are well seated.
I am loathe to take it to the dealership that created the problem in the first place so I hope someone has a solution or idea. Thanks.

Doug