So I finally have all the bugs worked out except for this bad boy. My tach worked fine before the swap, but now it doesn't read any signal (stays static at 0)

I was under the impression that the Blue and Yellow/Black wires comming off the dizzy were for the tach, so I hooked up my test light and I'm getting a signal on both ends of the clip.

Am I trying the wrong wires?
Is it because I'm using the USDM Dizzy with the JDM ECU? (JDM is internal coil, USDM is external coil)

Please help me out with this one guys, otherwise I'll be muscled into installing an aftermarket tach! yikes!!