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[Keith 944]

Originally Posted by SDT1DYI

I'm not sure exactly how to do that.
Running the engine and having three separate switches with a 12V power source and then with a Timing light , put 12V to each wire separately to verify timing changes. Then you would know for sure does each wire operate independently of the other or not.
Someone at MSD has to know the answer that would save the time, expense and effort of doing this.

You can bring it up on the laptop. Monitor timeing on the screen while engine is running,adding power to each, you can be your own switch, have an open +12v wire/ terminal, and touch each wire or all and monitor screen to see results.