Mnot (Gavin), I think you are right keeping the Miata switch a separate subject. I also don't see any reason that the flasher you selected wouldn't work. You might try it again with my diagram and you might get lucky.
I searching for as while for your solution, I found a great similarity in the way the pin numbers are numbered in various schematics. There seems to be a cross-platform standard for function vs pin number. If that is correct, then I offer the below drawing as one solution. It is based mainly on a thread I found over on Locostbuilders.co.uk
http://www.locostbuilders.co.uk/viewthr ... tid=145580According to them, the internal switch is clearly shown (excluding pin 58 of course).
The only difference between that and your switch is that yours has an additional terminal (58) that is wired to the marker lights. I believe that this is done so that at night, you could find the switch to activate it. there might be an additional internal set of contacts that would then "flash" that light when activated. This is a stretch but might be the case. In any case, I believe that it is not necessary to connect pin 58.
I used the Hella wiring diagram and simplified it.
It might be easier to use a spdt switch rather than the Miata Turn Signal switch to test out the circuit. Keep it simple.
Please respond with the results of your testing whether this works for you or not.
Attachment:
Hella 4-way.jpg
Attachment:
switch..JPG
_________________
Chuck.
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