Yes it could be your key switch and it could also be something funky with your battery. Take a hair dryer and hit your switch and the EHC to make sure they get dry. Can't hurt to fully charge and test you battery.Fan on all night, battery on a tender. Still same problem. Could it be my key switch? If I disconnect the battery. Put the key in and turn it to the on position. Then hook the battery back up. Everything seem to work ok. Bike starts lights com on. But the minute I turn the bike off. It goes back to not working.