Motorcycle Questions? Ask a Mechanic.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, proposed preliminary check (if have not been done) would be on the possibility of a pinched brown and/or brown/white and/or black/brown wire.
With no fuse or better yet, battery disconnected/removed, check the resistance to frame ground or harness green wire the above wires using a multi-meter.
Between the 2, a relay would be least likely whereas a pinched wire would offer the most exposure to potential grounding. Additionally, a relay's failure would often cause a part not to function such as a bulb not lighting up but not cause a fuse to blow. Fuse blows because of excessive current flow.
Start from the fuse box itself and follow / trace the brown wire which then splits/feeds the other wires.