The root cause is the the pressure equalization vents that are built into each light.
Ford edge tail light condensation.
Ford edge tail light condensation fix this tip shows how to end a troubling condensation problem in the tail lights of 2015 and later ford edge vehicles add a site find a good ford mechanic.
I have just got my car back and they replaced center.
First time the center tail light with replaced.
Whether it s due to a broken seal or a crack in the tail light itself condensation inside of a tail light can prematurely wear out the light burn the bulb and make the light useless.
In this video i will be using multiple ways to keep all water from entering my tail lights and creating condensation.
It s extremely rare for water or condensation to find its way inside of a tail light but it does happen occasionally.