ill bet its the integrator kit. i had one on my bike and when i wired it up i had the option to connect one of the wires with another to create the blinking brake light. On my integrator i believe it was a grey wire that tapped into another wire, im not sure. but thats my guess.

 

gotcha...and the integrator is the little black plastic piece that all the wires run into correct? I wish i had directions for that or something because the way that its in there doesnt look the greatest and i'd like to clean it up but dont want to mess anything up...