I had the dealership install my hitch receiver, but opted for them not to install the wiring harness. I then went out to to the local car part place and bought one of the cheap wiring harnesses and some what I would call "vamp clamps" or line taps. Problem is, I don't know which color wires on my '07 Commander are for the left and right turn signals, brake lights and tail lights. I am trying to splice in as close to the rear bumber as possible. No trailer brakes or anything like that. Just hauling a small cargo trailer for camping gear and dirt bikes. Can anyone help me? Thanks in advance for any and all help!!