Just so you know, if your problem was a fuse you wouldn't have power to whatever is powered by that fuse. Intermittent problems are not caused by blown fuses.
You might try resetting your uconnect system. I'm not sure if it's the same for 4th gens, but on a 5th gen these are the steps to reset it...
- Ensure your vehicle is in park and in “Run” mode.
- Press and hold down the volume and tuner knob buttons at the same time.
- Hold down the knobs for 10 – 20 seconds.
- After holding down the knobs, the screen should flash your vehicle brand name and then go dark.
- After a few moments the brand name will return, the system will reinitialize, and it will return you to the main UConnect screen.
If these steps don't work for you try disconnecting the battery negative terminal for 5 minutes or so. You might also try posting this in the 4th gen forum.