What fuse controls power to the trailer wire connector on my 2013 Dodge Ram 3500. I have turn signals, brake lights, but no running lights on my trailer.
For the 2012 model it was the J14 fuse in the TIPM, 20 amp fuse for the trailer tow lamps / park lamps.
my 2013 2500 did the same thing. I talked to my mechanic and its under the dash on the drivers side somewhere connected to a rectangle box. I still haven't found it though.