Currently own a 2016 F150 with rear slider window. Passenger side will not defrost but middle and drivers side does. The cab brake light leaked and came into cab on that side last year and since has been repaired, could this have caused the issue?

Thanks,
Bob

 

I suppose it's possible. The power from all 3 likely comes from the same source, and the weak link is between the power wire and the matrix on the window. I would check for power where the connection is made.