I'd START by taking the leads off the battery, scuff them up good with some coarse sandpaper, (The leads AND the battery terminals), then reinstall and make them good and tight. Then pull your relays out, scuff them with some scotchbrite or finer paper, put a small amount of dielectric grease on the terminals and reinstall. It is probably just an intermittent connection issue and this will probably solve it. As the lights didn't come on with key switch, it probably isn't in the 'kill' switch. I have had my 'kill' switch act a little goofy as well as the starter button, but a little shot of WD-40 fixed that issue. If it STILL persists, remove and reinstall the major ground points just like I described for the battery.