Diode Test

With diode assembly on bench, make test connections as illustrated, using an ohmmeter. Contact diode plate with one probe and contact each of the three diode leads with other probe. Note ohmmeter reading, then reverse probes and repeat test. Check both positive and negative diodes in this manner. All diodes should show a low reading in one direction and no reading in opposite direction. If any one rectifier is defective, always replace positive or negative holder assembly.