my friend recently replaced my starter for me and he said he disconnected the battery for a little bit and now my car starts but the antenna doesnt come up and the radio isnt lighting up or turning on. the rest of the electric is working, just not the radio. i replaced the fuse for the radio, and its not the fuse.
what should i look for or check that could be loose or disconnected that he messed up?
i really want to listen to my music...

oh yeah its a 95 jeep grand cherokee 4wd