I know this is an old thread but my 2014 limited does the same thing about 10% of the time - and rarely, restarts entire computer/electrical system. But headlights dimming when I brake and/or computer restart on brake (and/or when headlight leaver manipulated) is throwing me for a loop. It's so...
My backup camera is also black 90% of the time but works better when wet (guessing loose connection somewhere) and after the computer is hard-restarted (likely different loose connection somewhere)
I have not yet set out to solve the problem but appreciate the advice here, will try this first
