Get a wiring diagram off the tech area of this site and start checking with a voltmeter..You probably lost a connection or safety switch somewhere.. Maybe even a ground.
Of course, start with a known good charged battery and clean battery terminals..
EDIT:
Here's the link to the wide frame wiring diagrams off page four of the tech area...
http://www.onlycubcadets.net/forum/showthread.php?t=22
After checking basic grounds, check the ignition switch circuits first.