Rectifier Diodes

NOTE: Use an ohmmeter capable of checking diodes.

Check for continuity between terminal "B" and terminals P1-P5 and between terminal "E" and terminals P1-P5. See Fig 1. Note ohmmeter reading.
Reverse leads, and repeat test. Continuity should be present in one direction and not in other. If continuity is not as specified, replace rectifier assembly.

Fig 1: Rectifier Terminal ID

Courtesy of AMERICAN HONDA MOTOR CO., INC.