Hmm.... Just when I thought this was going to be easy... lol. I will have to pull the tire and check everything more closely at the junction box. I'll update you whenever I can find time to look at it.bjn2 said:In our 2023, the extra ground wire goes to the plastic junction box for traveling lights and brakes under one side of the trailer's A-frame per @Yoshi_TAB 's comment. There's also a green positive wire that doesn't go to the tub, but exits with the other tub wires down where they penetrate the trailer.