Get the wiring harness adapter from M61A1MECH it will make it much easier to connect your trailer adapter. I use the Hoppy isolated adapter from Autozone I think it's around 45 to 50 bucks and it draws the power from your battery so if you get a short in your trailer the bike lights still work.
Here is the link to the harness adapter.
http://www.venturerider.org/classifieds/showproduct.php?product=4200&title=auxillary-tail-light-harness-for-royal-star-venture&cat=35
Adapter
http://www.autozone.com/autozone/parts/Hopkins-Trailer-Tail-Light-Converter/_/N-a8pa0?itemIdentifier=70605_534335_0_
The main fuse is behind the cover behind the left side passenger foot rest. It is a good possibility it could be the regulator or one of the connections in between.
Sounds like the way mine did when the stator failed. Charge your battery and check your charging voltages after you check your connections and get home.
If the antenna is too long you may be able to remove some windings from the top but I have never dealt with these antennas. With almost no ground plane on the bike I doubt they are matched very well but I could be wrong.
Asheville. Dates are on the calendar in August 13 through the weekend.
http://www.venturerider.org/forum/calendar.php?do=getinfo&e=410&day=2014-8-13&c=1
Cool ride, like the mag wheels.
After riding the Harley for almost 700 miles this weekend the RSV was upset, the headlight was blinking on and off and one of the tires was low on air when I jumped on her to go to work this morning.