-- there is a fuse - look thru the manual....you'll find it - or the fuse box cover for it's numbered location
I did check the manual but there isn't a fuse for the tail light, just the one for the front.
-- Front Right-side fuse box - Item #4 = Lights 10amp ---- there is no other mention of front or rear, so that has to be the one
-- thats for the 2013 1199r......so there is possibility it may be different for you