brake modulators

The bike is a 2008 GL1800. I purchased the Kuryakan Pulsating Brake light. I am looking for the green and red wire under the seat, which I think I found. I used the light/continuity tester, and it binks when I pull the brake, but once connected, the pulsating unit does not blink. I am lost...

I installed Wig-Wag brake modulator on my 06 on trunk lights only - lowers stayed on...worked perfectly for 3 years;) until a deer encounter:o4:. Insurance did right by me:lol:, and I am now modifying my new 2010...including same Wig-wag modulator. I installed by splicing into green wire...

I have 2008 GW and want to install some back off lights. I understand the wire pack is behind the rear fender. I need to hook up in series the 2 wires to the brake light wire. Not sure of the best place to do it or what the wire color is. Any help?