Recently i took my car to an audio shop to connect my stock radio to my subs (2 12"s) and ever since then my navigation on my radio wont connect to the satellites that control the navigation. I tried to connect it on numerous different occasions in different locations and nothing's working. Im taking it to the dealership but i was wondering if anyone knows what the problem is. I have no access to ANY part of the touch screen whatsoever and i cant even use my equilizer on my radio. Other than that audio works perfectly and the volume works i just can't connect the navigation for some reason