cranks but no spark at coil

Ok ill try and answer/post results in order of how they were posted here.
Family dropped by so had to drop tools for the night.
Killer6, the battery voltage was approx 12 ish. Its a little low due to me constantly trying to start it with no success. So charger is on it now.
I will chk tomorrow for voltage drop of 0.5 V at red wire on ballast.
Other pink wire (non coil one) on ballast leads to 7 blade starter relay.
I didnt chk voltage but did chk for continuity and it shows continuity.
What do you mean "B+ while cranking"? Not sure what you mean sorry.
I understand the sparking from coil -ve when grounding but the wire that is supposed to spark (coil wire from center) is NOT sparking, no matter how close to ground I hold it. Strictly the one from coil -ve to battery -ve .
Not sure which wire you are asking about as per schematic?
Thanks for the help!
OK, You need to check that pink wire at the ballast unplugged from the ballast for voltage when the key is in cranking position only, again it should be within .5V of what
the batt. is reading at that moment(usually mid 10's-mid 11's if the eng is cranking)
The coil wire spark test,......are You tapping the jumper to the Batt. Neg post quickly? And I assume You switched out the coil wire to eliminate that so...........You may
need as mentioned to keep the module unplugged while performing that test because they give a ground w/some resistance.