Bought a Curt custom wiring harness #55363. Instructions seemed simple. Plugged in drivers side ran wires to passenger side. There is a big plastic box blocking everything. I think it is part of the emission control system. How do I get at the plug?
As a side note.....on my 2006, all tail light wiring is on the drivers side all in one connector. I can’t remember what brand trailer wiring harness I bought, but it just connected into the connector on the drivers side and the four flat plug had everything there......both turn signals, brake lights, and marker lights.