1967 Valliant Emergency Flasher Switch Wiring
There is no in or out, in the off position there are no connections, in the on position they are ALL connected.
You can remove the switch and your turn signals and brake lights will still work.
It doesn't care which way you plug it in.
What it does is connect the front left, the front right, the brake light and the flasher together.
So in the off position, no continuity between any of the terminals, in the on position continuity between all the terminals.
Alan