Electrical nightmare, burnt green wire at headlight motor Options

[edwin]

Hi all
So with 2 days till I had the car booked for roadworth and rego it looks like i may miss out.
Was chasing a no horn fault and looks like the right side headlight motor wiing shorted out on the green wire. I was under the dash when i noticed the huge amount of smoke wafting by the window. pulled the battery line off imediately but well too late for the green link wire between the 2 lights. main wire to the left headlight looks fine.
Any ideas if i should be looking at something in particular before i hook it all back up?
as i had the steering wheel off to test the horn i noticed some weird things with the highbeam/horn switch. looks like there is continuity between the highbeam switch and horn contact. Normal?
still havent fixed the horn and dont want to hook the battery up again till i am certain nothing else will let the magic smoke out.
any insights very much appreciated
Cheers
Edwin