Radio reception on 2002 Acura TL

Little or no radio reception. A few FM channels and two am stations depending on area. How to determine if it's the atenna or radio before taking it to a dealer?

Asked by for the 2002 Acura TL
Double check that the antenna is connected, other than that you would have to plug in a good antenna or a good radio to try and figure out which is bad. If you have an antenna that is integrated into a window, make sure the wires haven't been scratched or cut.