Modern Vespa

Was standing still at a red light - my Fly 150 just died abruptly.

Switched to a brand new battery
Ignition on => headlights on
Kill switch on
Pressing brake - no brake light!?
Pressing start - nothing happens, not even a click

Checked bulb for the brake light with multimeter - ok

If the brake switch failed, i.e. not registering that I was braking - why would it have died abruptly when I was idling at the redlight. That doesn't make sense to me.

Would a broken kill switch cause the brake light not to come on?

Or do you think it's the brake switch?

Update:

Brake light doesn't work for either left or right brake
Turn signals doesn't work
Horn does work
Headlight works

Think it's the kill switch.

Have you checked the fuses 4x behind horn cover

I agree.

The 4 fuses in the front are all ok.

Went to dealer and picked up a new kill switch for $23

....hopefully that will fix it.

Replaced kill switch => Problem solved!