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Diode Test

  1. With diode assembly on bench, contact diode plate with one probe and each of 3 diode leads with other probe. Note ohmmeter reading. Reverse probes and repeat test. Check both positive and negative diodes in this manner.
  2. All diodes should show a low reading in one direction and NO reading in the opposite direction. If any rectifier (diode) is defective, replace holder assembly.