Originally Posted by AlohaMowing
When I disconnected the kill circuit wires directly from the ignition modules I had no spark at all
That ^^^^^^^ shows both ignition modules are bad......
This is what appears to have happened;
A diode is a one way valve so to speak, It lets current flow in one direction only. When this diode blew for whatever reason it shot positive (battery) current to both modules through the kill (ground) lead blowing both.
You can verify by testing both modules with your multimeter as shown below, The part number will be stamped on your modules to ID which specs to use.
Test for battery voltage on the white kill lead wire with the ignition switch turned to ALL positions BEFORE hooking them up to newly installed modules, You don't want voltage to blow them again......