Have a 2015 Ram 2500. While towing a trailer this light popped up and code P0652. once I unhook from a trailer using the round 7 prong the truck will clear the light and code. Doesn’t happen with the small 4 prong plug. Did a 600mi. Trip this weekend and never a light with my boat (4 prong) Hooked up to a trailer with 7 prong this morning and within 10min the lightning bolt and code came back on. Anyone have any clue on this?


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