trailer wiring

QUESTION: How can I tap into a switched power source near the back (such as the running light at the rear brake, or license plate light) without upsetting Mr. BUS of CAN? The trailer is currently installed with regular incandescent bulbs - NOT LED - but I'm not worried about current draw, with...

:scratch Hi all, Other than "don't" does anyone have any advice on how to wire up trailer lighting for a 2009 R1200GS? We're usually two-up for camping weekends or 4-5 day trips. Because we're two up it's really difficult to pack properly and not be too top heavy so I bought a little Uni-Go...