I hardwired mine into a 3 way kuryakin switch master cylinder switch : here is the write up I posted on when I initially installed the switch: http://www.venturerider.org/forum/showthread.php?85214-Kuryakin-3-way-switch-install
So, my switch runs through a relay off the battery and runs my passing lamps, another set of lamps and the GPS. To trigger the relay, I connected to the headlamp in the fairing (used the wire that used to power my passing lamps). For the GPS, powered through the switch I used a 2 amp fuse that I added and found a ground on the frame holding the cassette deck. Everything is controlled by the relay and none is active unless the bike is running. Hope this helps!