diagnosis help

[Nathaniel Merrill]

Just to complete the thread for posterity...
I've confirmed that the ECU is supplying the correct voltage to the hall sensor, even when the signal drops out.  I've also determined that the wires are ok - power from the ecu is constant at the dizzy, even when signal drops, and signal is dropping out at the hall end - not on the way to ecu.
So, it looks like my spare dizzy was indeed failing also.

I need another to complete the diagnosis, and repair.  

Anyone have a good 20V dizzy, with metal gear they will part with?