We recently made an adapter plug to pull the trailer with a Goldwing, since the Rt uses a seperate brake light for each side and could not find a reason for this so we adapted with an additional plug making a pig tail adapter so as not to alter the original wiring when pulling with the RT anyone interested we can send diagram, my question is {Maybe Lamonster Could Answer} how does the SM recognize the trailer ? the two spares , plus the backup light prong in the plug show NO continuity with each other or anything else, as in completing a circuit, the SE has to be put in trailer mode, not the SM. I know the Can Bus wiring could sense the additional load of tailights and recogmnize this way I am just wondering if someone can tell me how this works as touted by BRP as "Recognizing the trailer " in their adds.