The kill switch is like a small lever on top of the new unit I'm not sue how to tell if it's an open or closed circuit, I have read the electrical f@q and can't see what the other wires are,
I can't read the diagram too well, I've read past threads on the search section and have come accross mixed results of what the wires are and do, and what to splice them with. I would post a link to the unit I bought it off of eBay but I've only got an iPhone and I'm not sure how too.