Upon further continuity tests, I discovered that actually there was a discontinuity between the dash pin 7 (the battery light) and the alternator D+ terminal. This is the blue wire that goes from the dash light to the alternator. I cut it near the fender and spliced a new wire to the alternator connector D+ terminal. Now it reads continuous.

With this I now get the battery light when I turn the key and when I start the car it goes out. But I am still reading only 11.7 volts at the battery with the car on and the new alternator installed. Revving the engine does not produce any significant change.

Unplugging the glow plug relay makes the voltage jump less than .5 volts.

Any ideas?

Thanks.