Electrical problems

I tried to explain. Read my post.

IF YOU HAVE a module--a WORKING module, the factory Mopar ECU DRAWS COIL CURRENT with the key on/ engine stopped. This means the current goes from key to ballast to coil to ground through the ECU switching wire. This will DROP the coil reading through the ballast

IF YOU WERE to use a GM HEI WITH a ballast, it WOULD NOT do this---because under same conditions, the HEI does NOT draw coil current. There is nothing to DROP the ballast voltage.

As I said earlier, I DO NOT KNOW if the Mallory is this way

Possibilities?

Miswired?
The module is no good?
The module is not grounded?
The module works like an HEI and does not draw coil current when stopped?

This is why I suggested "hot" wiring the ignition to bypass the ballast and harness, then you can concentrate on the trigger device, the module, coil, and power to the ignition system.

Do a search and find the Mallory web info on troubleshooting.