Is this the right way to test the ballast resistor

[dodj]

I'm using a Rev-N-Nator.

I'm not familiar with it. As far as wiring it is the same as stock? Or is it a rewire like the msd?

[chargerdon]

then the resistor can lower that voltage to even lower.   

The resistor is bypassed during start, at least it is supposed to be wired that way. Limits coil voltage once it's running.

There are two different electrical paths...   During start the resistor for the coil is bypassed to give a hotter spark for starting....However, trace the path and you will see that during "start" the voltage to the ECU gets passed thru the other side of the resistor thus lowering its voltage...with the voltage already dropping to near 9 due to the starter drawing massive power that can then drop the voltage to the ECU.  If it drops below 6 volt it wont recognize the reluctor and will not trigger the fire of the coil.   

That is why the connections for the "start" cycle thru the flat connector at steering wheel and thru bulkhead have to be clean !!   It can be a problem...   

[blown motor]

I'm using a Rev-N-Nator.

I'm not familiar with it. As far as wiring it is the same as stock? Or is it a rewire like the msd?

I looks just like the original ECU but has a built in rev limiter. It's plug and play.

[Bullitt-]

I'm using a Rev-N-Nator.

I'm not familiar with it. As far as wiring it is the same as stock? Or is it a rewire like the msd?

I looks just like the original ECU but has a built in rev limiter. It's plug and play.

Rev-N-Nator is a 4-pin ECU so the ballast would not effect it but I imagine if voltage is to low that would cause an issue. 
I'd want a known good ECU on hand to test with.