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Diode Trio Test

  1. With diode trio removed from end frame, connect an ohmmeter to single connector and to 1 of the 3 connectors. See Fig 1. Observe reading, then reverse leads.
  2. A good diode trio will give one high and one low reading. If both readings are the same, replace diode trio. Repeat tests between single connector and each of the 2 connectors.
NOTE: Before replacing diode trio, also check rectifier bridge. Do not use high voltage, such as 110-volt test lamp, when testing diode trio.
Fig 1: Bench Testing Diode Trio Test diode trio using an Ohmmeter
G12902
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