Tail Light Wiring

I am trying to wire up my custom lights for my 07 R3 Classic Tour. I finally got the right led flasher (GL model, not JL), and my tail light and turn signals work (without load EQ's yay). However, I cannot get the dual-element to work on my taillight. When I press the brakes it doesn't light up. I think I have it wired wrong, but the triumph manual I have says there are only two wires going to the tail-light - Yellow and Black. My tail light had Red, Black, and Blue wires.

Which one is running, and which one is brake, anyone know?

I used a volt meter at the wiring harness to find the one for the brake light. Cant remember which one it was but I can check tomorrow.
If the wires are different colors by year model buying a meter is your best bet.