I think you are on the right track, Ldub. I could not get the lights to come on either, I finally got it started and restarted x10, everything but the idle working normal, I unplugged the idle control and plugged it back and that worked too.
I used di-electric grease on all my connectors and my battery connections look great, but my ground cable has some(only a few) frayed and corroded stands (cleaned) near the battery. I'm starting to think it's the ground cable. If I can, I will run an extra ground strap
Gremlins