July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Inspect Rotor

Check that there is continuity between the slip rings (C).

Fig 1: Rotor, Shaft & Slip Rings
Courtesy of KIA MOTORS AMERICA, INC.
Check that there is no continuity between the slip rings and the rotor (B) or rotor shaft (A).
If the rotor fails either continuity check, replace the alternator.