I am off today to figure out the wiring on my 03 SSEi. I will post results as I have been searching the site with no luck as to a wiring color code or any info on the trailer harness instal so keep looking I will post more after I am done.

The trailer hitch mounted in 30min. Had to jack up the rear end and lower the exhaust from the center hanger back. This will allow for the drilling of two holes into the frame. As the holes are directly above the mufflers. New hangers came with the hitch and instal was a snap.

i can get my hands on wiring diagram if you need them.. Let me know which diagram you need...

Ok just back the color coding is as follows:
Drivers side: Passenger side:
Black......common ....................same
White......Brake...............................sam e
Lt. Blue...Lt. Turn.............................none
Purple.....Running...........................Brown with white stripe
Green......Back up...........................same
Dk. Blue..Not used ........................Rt. Turn

I hope this helps anyone. this is off an 03' SSEi