In the past few months my factory unit on my 15 expedition can only tune in our one local radio station. Used to get a lot more out of town stations just fine. I haven't touched anything with the head unit, but i do vent the rear side windows where the antenna resides quite often. I'm wondering if it got disconnected from the glass. I see a wire in the tracking back there, but nothing was loose that i could feel. Where exactly does it connect to the glass, and how would i go about fixing this? Lately my diy'ing has turned into diWhy, so i'm hesitant to just start ripping out the rear interior.