Looking to add the Toyota tow harness to my 12 rc 4X4, but the partsman says they only make one, pt725-35120, for models equipped with drl (daytime running lights), which mine does not have. I put kit #08921-04960 on my 2008 rc 4X4 with no problems. It's a great upgrade to the wiring. Anyway, I found a wiring diagram of the 2012 tow harness:
It appears that there is an input to the relay from the drl. Any electronics guys out there with advice on how to make it work?