Tail light wiring ID...

Hi Gang, could anyone tell me which colour wires I need to connect these to on my UK 2002 bike please?

I had it working once but it just seems to be very bright or nothing now it's on the bike...

Thanks for any help...

G (green)               = earth/ground
G/Y (green/yellow)  = Brake light
Br (brown)             = tail light/ running light

so your black to the green
   your red to the Green/Yellow
and your yellow to brown

Thanks very much for the help