Noob with a new mx5 Saturn build.

[Numplumb]

I can't read your writing on your diagram.
Have you googled flasher unit circuits and hazard switches? I think that you have to supply most hazard switches from both a permanent and a switched with ignition supply, the switch is fed via the ignition supply when off which feeds straight through to the indicators and when the hazard switch is turned on it isolates that supply and feeds via the permanent one if that makes any sense.
Regards Mick.