Diode Trio
- Remove diode trio from end frame assembly. Connect an ohmmeter to single brush connector and to any of 3 stator lead connectors. See Fig 1. A good diode will give one high and one low reading. If both readings are the some, replace diode trio.
- Repeat tests, touching leads in turn from single brush connector to each of 3 stator lead connectors.
NOTE:
Before replacing diode trio, also check rectifier bridge. Do not use high voltage (110 volt) test lamp to check diode trio.