...but not sure if it works with your particular model of Headlight Modulator you have from them:

Toggle Modulation ON and OFF The modulation of the headlight can be toggled on and off by the user during daytime hours, as per DOT regulations this feature does is not available at night. When the bike is started the default is modulation ON. To turn the modulation on or off simply switch your bikes high low beam switch to the opposite position, and then back to the original position within one second (this can be done with the switch in either the high or low beam position).

http://www.signaldynamics.com/plugandplay