Ah there is a solar panel and it bypasses the battery cutoff to charge the battery. Could that be it? Wondering....
Mystery to me on that as well. If there is an actual short at the tail light you would expect it to maybe blow a tail light fuse in your truck when connected. So the only wild guess I could come up with is the positive wire from the solar panel is routed near the tail light receptacle and somehow accidentally making a very slight contact with the + side of the tail light bulb.Yes it all works as it should. I'll ask tomorrow when I go by the dealership. That would explain why it's so dim?