I have to say that there were no signs of moisture damage. Not totally sealed by any stretch of the imagination. Spiders making their home in there is proof of that.
I am fairly sure the control module developed an internal fault, and that is a resin block, so insufficient safety margin in the module circuit design is my bet. They do tend to last longer than mine did.
Now I have a new problem. I kept the original coiled cable and j1772 plug as it has a light in the tip. one something internal in that plug has worn to the point it is almost impossible to release the locking lug to unplug from the car by squeezing the trigger. I was thinking of filing down the latch so it barely locks, but then I wondered if the socket has a latch lug detection in it. Anyone know?
I have the new cable and plug unused to swap to if necessary, but I liked having the light in the end.