I'm not familiar with your bike or wiring, but you can use a test light to check the switch.
Plug the harness into the switch. With the key off, if you probe the wires, you should only have one wire that's "hot". With the key on, all of them should be 'hot", with the possible exception of one wire that might be "ground".
I had a similar issue with the ignition switch on my DS7. I had power to the switch, but nothing coming out. Turns out it had a corroded contact, and the tiny spring that applies pressure to the sliding contact had disintegrated.
Oh, and it shouldn't be your kill switch. That switch cuts power to the coils, which cuts the spark, which kills the bike. It doesn't effect the electricity flow to any other function on the bike.