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Bench Testing: Rectifier

  1. Using an ohmmeter, clip one ohmmeter lead to negative diode heat sink. Touch other ohmmeter lead to each negative diode pin. Reverse ohmmeter leads and repeat test. Diodes should show continuity in one direction only. If continuity exists in one direction only, go to next step. If continuity exists in both directions or continuity does not exist in either direction, replace rectifier assembly.
  2. Clip one ohmmeter lead to positive diode heat sink. Touch other ohmmeter lead to each positive diode pin. Reverse ohmmeter leads and repeat test. Diodes should show continuity in one direction only. If continuity exists in one direction only, diodes are okay. If continuity exists in both directions or continuity does not exist in either direction, replace rectifier assembly.
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