Diode Trio Test
- With diode trio removed from end frame, connect an ohmmeter to single connector and to 1 of the 3 connectors. See Fig. 5. Observe reading, then reverse leads.
- A good diode trio will give 1 high and 1 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.