I'm stumped on electrical problem

while riding last night my 2000 1500i just quit at a stoplight. Hauled it home and have it tore all apart, keeps blowing the main 30 amp fuse. Bypassed battery, cables, ignition switch, clutch switch, took tank and side covers off and unplugged all connectors and relays, no matter what it pops the main fuse instantly. Even took the headlight out, I don't know what else to check. What am I overlooking here?