Alternator not charging

Maybe this helps some. Start out by checking your meter. In this first photo, the probes are not hooked to anything, and the meter is set on ohms. The display (yours may be different) indicates an open or infinity.

(On mine, this does not mean 0 or zero ohms. It's "OL" or overload, which on a Fluke means infinity)

In the bottom photo, the two probes are shorted together. Here, the meter says .3 ohms, very close to a dead short