radio/ interior light gremlins

[jjmorrse]

i attached one of those adapters that lets you broadcast from your ipod to the radio. Unfortunately, when attached into the lighter, it flickered, then the underdash light went on and the adapter went off. Now, when the lighter is in, the underdash light goes on, and the radio does not work. when the bulb is taken out of the underdash light, then it works. My question is, what could be the problem? the lighter, a blown fuse, the radio, the light? Thanks