The bike is powered by the red wire, it starts atop the starter solenoid (starter relay the heavy battery cable runs to.) That red wire runs through a connection plug w two wires in it, one red the other red/white. Make sure that hasnt come un-done then on to the main fuse 15amp. (check fuse.) From there another 4 wire plug (check it) then on to ignition key switch, from the ignition key switch it splits off and feeds the different circuits on the bike. Lights, ignition coils, etc
So if nothing works..horn, starter, etc. The main fuse may be blown, (do to a short circuit, broken or melted insulation) or that red wire may be unplugged, broken, or come unplugged off ignition key switch. If you have a meter use it, if you find no power at the red end of ignition key switch. Work your way back to battery, checking that wire at the plugs and any other connections.
If you have power to the red wire at the key switch, check the other key switch wires to make sure the key switch isnt bad. Then work your way forward along each wire.
The schematic is on pg 120 of the official honda workshop manual I gave you. There are several. Be sure to use U.S.A model.
