Today on this 2015 Honda Odyssey, we're going to show you the Curt-T Connector Vehicle Wire Harness with the Four-Pole Flat Trailer Connector, part number C56118. Before we get started, we'll go ahead and cover components. First off, we have a one-piece wire harness right here. This plugs into your pre-existing port in the van. This white wire with the ring terminal goes to sheet metal or ground… see more >