I had body repairs done on my 05 Cooper. Since I got it back the AM radio won't pick up a signal but the FM works fine. I called the shop and they did take off the antenna but I checked the connection and it was OK. Anybody have an idea as to what may be wrong? All I get with AM is static and a clicking noise.

 

The defroster grid on the rear windshield is connected to the antenna circuit. Maybe somehting wasn't connected right back there.