Diode Trio Test
- Remove diode trio from end frame. Connect an ohmmeter to single connector and to one of the 3 connectors. See Fig 1. Note reading and reverse leads.
- A good diode trio will give a high and low reading. If readings are the same, replace diode trio. Repeat tests between single connector and each of the 3 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.