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Inspection & Repair: Diodes

  1. Perform a continuity test on all diodes in both directions using an ohmmeter. Test the continuity between each terminal and plate. Diode installed on a "+" plate is a positive diode, which allows current to flow from terminal to "+" plate only. Current does NOT flow from "+" plate to the terminal.
  2. A diode installed on the "-" plate is a negative diode, and allows current to flow from the "-" plate to the terminal only. Current does NOT flow from the terminal to the "-" plate.
  3. If current flows in both directions, the diode is shorted. If current does not flow in either direction, the diode is open. If any diode is defective, replace the entire diode assembly (individual diodes are not serviceable).
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