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Diode Assembly

  1. Remove diode (rectifier) assembly from alternator. Check continuity in both directions (reverse test probes) between terminal "B" and the following terminals: P(1), P(2), P(3) and P(4). Then check for continuity in both directions between terminal "E" (ground) and the following terminals: P(1), P(2), P(3), and P(4). See Fig 1.
  2. All diodes should show a low continuity reading in one direction and NO continuity in the opposite direction. If any diode does not test as specified, replace entire diode (rectifier) assembly.
Fig 1: Testing Diode (Rectifier) Assembly
G90F04034Courtesy of AMERICAN HONDA MOTOR CO., INC.
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