Speakers going in and out
 

I have noticed over the past couple of weeks I can hear the front right and center channel going in and out. If I adjust the volume higher it will come back in in both??? And ideas? I have the factory nav with screen and sony with subwoofer . The door speakers have been replaced with kicker and they sound find.

I have the same issue with my 2011 F-150. I took it in while its still under warranty and they replaced the harness in the door. Sadly they mis-understood which door I was referring to and replaced the harness in the back passenger door instead of the front.

I haven't noticed the speakers cut out in a while but have noticed when it did I was going over a bumpy road.

If it happens again, I'll take mine back before warranty goes out and hope they find the problem.