Horn doesn't work on my 2006 Suzuki Boulevard C50. Is there a fuse for it? If so where is the fuse box?

Question edited for clarity.
Question moved to model category.

The problem with a Trike is that the wiring will be custom. For the brake light, check the switch with a multimeter for continuity. For the lights look for a break in the wiring. There may also be a relay involved in the running lights.

https://www.google.com/search?q=2006+suzuki+boulevard+c50+service+manual+pdf

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I am having issues with my 2008 Suzuki boulevard m50 my fuel gauge doesn't work and my Neutral light doesn't work and my horn doesn't work I found a blown fuse and replaced it but that didn't fix it I am need of a oil change Suzuki saids to use 10w40 what another oil would work

fuse box either under seat or one of the side covers. your issue could be a fuse. can you jump starter with cables to verify starter works?

under the seat near the battery

The main fuse (30 amp) is under the saddle. The system fuses are found behind the left side crankcase cover along with the coolant reservior.

there is a set of fuses ....... when standing facing the side of the bike that has the clutch on it.... look down at the section of bodywork rearmost (closest to the rear wheel) this section can be unscrewed. in this you will find the relay for the starter motor and the indicators. as well as a small box type containing a number of fuses.

Should be behind one of your sidecovers. I f you did'nt get a manual w/yor bike then order one from your dealer. It's an invaluable tool....Good luck to you friend....Tim