I own a 2014 Ford Escape (the most basic model you can get with base model Sync). I've been able to stream Slacker, YouTube, etc with no issues up until about 2 weeks ago when it just quit. I was streaming, got a phone call, disconnected the call once done, and...NO MORE AUDIO. I've been able to use my phone just fine through the bluetooth in the car, but no streaming audio worked AT ALL. I tried everything as far is master reset, power cycling my phone, unpairing and pairing, forget the device, you name it.
Disconnecting the battery is a no go, since the design of the car is not made for just anyone to reach the negative post. I found the fuse box under the glove compartment (as per the owner's manual, of course). I disconnected the fuse marked "F67" for "SYNC, Multifunction display, Global positioning system module". Once I disconnected it, I powered my car off, let it set for about a minute, put the fuse back in, and started the car. Bluetooth was still set up, so all I had to do is go through the menu to listen to bluetooth audio. I was happy to find that IT WORKS!!!!