You are missing your fuse holder. There are two big red wires, one that comes from the solenoid mounted on the left hand side of the battery box, and the other that goes into the harness. Your electric starter will not work without it, and the light will only work when the motor is running. Hers a pic of the fuse holder, I removed it from the keeper for the pic. (plus I see that mine has 20 Amp fuses {there is a place for a spare} when the book shows 15 Amp. will have to change that and see what happens)
ATCnut
82 185s - sold
83 200x (hopped up)
84 200x (stock)
84 70 (lost this one to the DMV)
85 70 (soon to have lights, a foot brake, and CDI ignition)
84 200es (parts trike) - sold
85 350X (the best)
85 350X (siezed motor, dream of a poweroll kit someday)
85 250sx (frame was trash, got parted out)
86 250sx (the tractor)
86 250sx (a nicer tractor)
86 250sx (an even nicer tractor)
87 200x (parts trike, its really rough, a dog was chewing on it for a while)
87 250es Big Red (the tank!!)