I disconnected the brown wire at the cluster connector behind the gauges, as I thought it was no longer needed. This wire (I believe) supplies the "Gen" light on the standard gauges with idiot lights. With the idiot lights, this light would have come on with the ignition on. Now it is disconnected. So, the regulator probably is NOT getting an ignition signal. This could be the problem???? However, the gauge conversion directions call for this brown wire to be taped off.
I should check the brown wire for continuity with the key on - I haven't tried that yet. I did replace the regulator though, with a solid state one. How can I check it for ground with an ohmeter????