Have noticed my rear speakers are dead. Front drivers door cuts out intermittently, I think these two problems are related. 2010 lariat with Sony nav. Any one having similar problems?

 

My guess it's the HU not the speakers-

 

I would pull the speakers and look for water damage. The bottom window seal shrinks and let's rain get down in the door which drips onto the speakers. I cut baffles in half long ways to shield them when I got new ones.