Hey guys, my 1.6 miata currently wont start due to zero spark.
Ive tested a new coil pack, new CAS, new plugs and new leads.
My next suspicion is the actual power/signal/ground wires supplying these units.
i have a multimeter but cant figure out what pins are meant to read what?
I have a 3 pin coil pack plug and a 4 pin CAS, does anyone know what each pin should read if working correctly?

thanx

 

I believe all of the boards have diagnostic LEDs on them. If you open up the case you should be able to see if the ignition LEDs are lighting up. That would tell you if the ECU is actually sending a signal to the ignition system.