No spark when cranking

-Sounds like a short/drain on the Ig1 circuit; since it runs with any one of three items disconnected( two of which are new). Or as previously stated, the starter is sucking up all the juice. Or a defective battery/battery to starter circuit.
-If only 11 volts at the blue wire when Ig sw in run position(per post 1); is that within 1/2 volt of battery? If yes then battery needs charging. If no, and bat voltage is 12.5 or better(still in run), then where did the missing volts go? Trace it out.