Originally Posted by Heli-Cal Blue

HOWEVER - when I do the alternator Diode test, car off, and multimeter set as in the photos, I get the following:

With the black lead on the positive post / red lead on the alternator housing I get 205 as shown. (.205 volts)

With the red lead on the positive post and black lead on the alternator housing, it climbs through the range to max at '1.484 / 1.494' as shown.

I have not done an AC multimeter test on the alternator yet, merely ran out of time today, had another project to tackle elsewhere. But with the above result of 205 (.205 volts) as opposed to a range of 500 to 800 (0.5 to 0.8 volts), wouldn't one deduce that's suspect considering all else is working properly, especially with the battery draining in a single night?

.