No spark from coil???

My 72 Dart with electronic ignition, turns over, but will not start, no spark from coil wire plug, on + side wire it has 10.75v, on ballast resistor I got 2.1ohms & timp outside when tested was 96 deg. so don't know why I'm getting no spark???
forgot to put, I did try a used good coil from a /6 car, steel did not start, tested for spark from coil, steel no spark, tested for ohms on premier & security of coil on my car, it did have ohm on both!