I had tried to explain that ........
There are three switched circuits in the key-switch
Two have a common input source - the headlights and the ignition circuit;
the third - Turns/Horn/Brake light has an independent power source; (it's like having two separate switches ganged together mechanically)
If NONE of these is working it would be unlikely to be the switch and a fundamental power connection at the battery
If the lights AND Ignition OFF but the third circuit works then very likely the switch itself (or the connector plug).
Edit - quick question - are you running a stock headlight bulb? (the main headlight)
Or do you have a 100W bulb in there?
(previous dismissal of key-switch failure with Touring more applicable to stock 55/60 bulb and all bets off if you have high wattage bulb)
Again, suggest you at least uncouple the key-switch connector (especially if only the lights/ignition are the problem) and look for any signs of arcing/burning at the terminals
(ignore top half of this - picture just to show the Key-switch connector
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