Just installed a 7000nex a couple days ago. Did not hook up pimk mute wire as was not sure where that would go. Seemed to function fine at first. I updated the firmware to newest, updated the bluetooth right after. I linked with my windows phone to check Bluetooth and it seemed to work. However after checking everything out, I all of a sudden had extremely low volume, and the steering control volume, and the face volume button ceased to function. On first press of either, there is the beep that it received the command and the volume bar comes up on the bottom of the screen, however the volume