OK went back and found distributorless ignition and the 4 pin connector,here is the data.
Terminal 3 (coil 1) plugs 1 and 5
Terminal 2 (coil 3) plugs 2 and 6
Terminal 1 (coil 2) plugs 3 and 4
Measure from terminal to high voltage terminal and suprisingly the spec is the same from 6500 ohms and 11,500 ohms.
You certainly seem to have confirmed a open coil as you should have seen resistance between 6500 ohms and 11,500 ohms from the high voltage output for plug 4 and terminal 1.
Just curious do you show battery voltage at terminal 4? you should have