I"l give you colour,[ Abait dt400] , most yams of this age were similar, Brown wires are feeds from battery[ Via the ignition], brown/white [ flasher unit] Pink horn] black/whites [ kill switch] ,Yellow A/C lighting,
No7 is C,D,I. 18 iggy switch,, 12 Light switch, that's the main items , the rest are visable
Its an illimination process " , start at the plug- and work back to the stator, .and how do you know the ignition switch aint faulty diconect the Black/white ,from that too . and go introduce yoursell, you naughty boy,