I found an odd plug when I had the bumper off and seems like it could be for the tow harness. any opinions?
This is the part # u need......0892135870. The best price I could find was $75.60 plus shipping here: https://www.1sttoyotaparts.com/partscat.html
Post # 22 in this thread shows the installation details: http://www.fjcruiserforums.com/forums/stereo-electronics/4249-wiring-trailer-hitch.html
The above part # has everything you need. Minus the trailer hitch of course.Make sure you get all that you need you need several things besides the pigtail to plug in the back, there is a relay and some other thing that mounts inside under the firewall there is a plug that is already there that plugs into this little box. Easy to do took me 20 minutes and is factory.