Charging System: Alternator: Inspection: Rotor

Check that there is continuity between the slip rings (A). It is normal if there is continuity.
Check that there is continuity between the slip rings and the rotor (B) or rotor shaft (C). It is normal if there is no continuity.

Courtesy of KIA MOTORS AMERICA, INC.
If the rotor fails either continuity check, replace the rotor.