Well that exactly what I thought too. So the first thing I did was disconnect the complete hitch wiring.. still blew the fuse. All the connectors look good, haven't seen one bad connector on the whole vehicle.
So what's next? I haven't a clue
I've read a thread on here that was a great read... I have a 2010 FJ and not as bad as in the thread but still have the same problem... the tail light fuse blows as soon as I turn the lights on.
I have an aftermarket hitch that the PO installed, but it looks good.... is there a plug or...