2013 Tiger 800 Abs: Could Really Use Some Help!!!! With Brake Light Modulator

Hello All,

I recently purchased the Fast Flash 60 brake light modulator that's said to work with both incandescent and LED units. Wired it into the switched line at the tail light and it seems to works as advertised (fast blink - slow blink - solid on) when the REAR brake is actuated, but when the FRONT brake is actuated, the brake light shines solid... No blink. At least most of the time. Every once in a while it will flash when the front brake is actuated. I'm right at the tail-light, so downstream of the junction of the lines from the front and rear brake switch.

Hoping someone has already tread this path of uncertainty and can offer some guidance.

Thanks!!