Rectifier Bridge
- Connect an ohmmeter to grounded heat sink, with second lead held firmly against flat metal connector (not threaded stud). See Fig 1. Then reverse leads to same heat sink and connection. If both readings are the same, replace rectifier bridge.
- A good rectifier bridge will give one high and one low reading. Repeat this test between grounded heat sink and other 2 flat metal connectors, making a total of 6 checks with 2 readings for each. Check other 2 rectifier bridges in same manner.NOTE: Do not replace rectifier bridge or diode trio unless at least one pair of readings is the same. Also, never use 110 volt test lamp for this test.