It does look like, from what I can read, that the older modules, with five wires, do receive their power via the four pin ballast and brown wire while the key is in the Start position...so it is quite probable that either that side of the ballast is bad, or the module is bad.

The four wire modules have the resistor built in the box if I read correctly.

It's very possible we have been going in circles barking up the wrong tree...but, I still want to know why the voltage is so low to to the coil during cranking Maybe the module is shorted internally and taking power to ground?