So the battery positive is dropping to 9 volts as well as the coil positive while cranking? If so, sounds like you've got something seriously pulling the battery down during cranking, or a bad battery.
If they are coil voltages (12.9 in run and 9 in crank), to me it seems like the ballast is in the wrong circuit.
THAT is an interesting thought. Can't happen unless someone has been messin with the wiring. I think at this point I would separate wherever the Mallory gets power and jumper 12V direct to it.
NOTE!!! These voltage readings depend on a factory "like" module. It occurs to me that I do not know if the Mallory draws current when not cranking. For example, a GM HEI module does not, meaning, you can turn on the key, and the coil will not draw current, so the coil connection will read full battery, against the stock Mopar which will draw the reading down.
What I'm saying here, is that I screwed up because for the readings to be meaningful you have to know WHAT IS NORMAL for a functioning Mallory system.
