As you are finding out, electrical problems are the most difficult and frustrating to diagnose. The first thing to do is to get your hands on the electrical schematics for your bike and a multimeter. Since you're getting no power anywhere, there is a main switch, relay, fuse, connection, or ground that is stopping everything. I didn't see anything on the Lo Jack web site that says it's used to disable the bike. We can give you guesses on things to check, like the ignition switch, but your best bet is to get the schematics and start at the battery to see what's preventing power from getting through. You might check on Kawasaki forums in case this is a common problem on you bike.
"We didn't trade shoves; I did all the shoving." -Bobby Knight, 1981