Right side Handlebar;
Orange 12v to brake lite switch. Red from Brake switch to rear brake light bulb.
Grey; Kill switch 12v from Ig. sw., white from kill sw, to coil, and also jump to...
Starter button 12v in, Black from starter button to Starter relay.
Green 12v in to rt turn sw. Brown 12v from rt turn switch to rt side Indicators.
Left Handlebar;
Blue 12v [lites on] from ignition sw. to Hi-Low beam switch.
Yellow from Hi/Lo switch to Low beam at headlight.
White; from Hi/Lo sw. to High beam at Headlight
Orange; 12v to horn Button, Black from Horn Button to horn.
Green, 12v in to left turn switch, Purple from left turn switch to left side indicators.
Note; Blue wire from Key switch [lights on] to taillight and Handlebar switch. Should have a Breaker in this circuit.
At headlight the 3 prong plug is Blk [left] =ground [generally to housing] Middle is Yellow [low beam from switch] and 2 White, high beam from switch and 12v from Headlight to High beam indicator light.
Note; Orange is 12v from Ignition [Key] Switch; switch [on] or sometimes accessory [if accessory is On with Ignition and Lights]
One orange wire to each handlebar Horn and Brake lights. And orange powers the Oil light , the Neutral indicator, and the Rear brake light [pressure] switch [which ties to the red wire from front brake sw. to Rear Light housing]
Orange also supplies 12v to Turn Flasher unit, Green is 12v out of flasher unit to the handlebar switches. Located in headlight housing.
Orange from Key switch to Headlight housing should have a Breaker.
Grey wire 12v for ignition, should have a Breaker sometime after keyswitch.
Keyswitch 12v in is generally a Heavy red wire from Breaker attached directly to battery 12v.
Gettin kinda complicated Now..Gonna Stop.
I Start at the Handlebar switch housings and workback...easier
Contact me with any Problems
Marty