I found the diagram for the grid charger on another site. It has 3 meanwel 48V supplies and a constant current LED driver. It was adjusted for 177V unloaded. Yes blowing into the fan exhaust. I figured it would draw cooler air from the trunk and blow into the cabin but guess not. Guess I didn't see or pay attention to the flapper when I took the ductwork out for fan locations.
Thanks for al the pointers and direction. Will have to wait for daughter's college break and pull it all apart. How I love doing that!
So much for a low maintenance vehicle for her!