Hmm confusing, really confusing.
Can the new CD module from CDI Electronics be bad.Should not, but can be.
Have you checked the connections in the plastic plug-in plugs from trigger to the CD module?
Corrosion or bad connection from wires to the male pins/female sockets?
Check all wires for bad insulation/wear.
Outboardignition has the troubleshoot chart. Maybe you already have followed it when you DVA measured it.
This system was also at the 35Hp Force engine in 85-89 I believe.
If no luck you maybe can call CDI Electronics and speak to a service technician.