Bench Testing: Diodes
- Perform a conduction test on all diodes, in both directions, using an ohmmeter. Test the conduction between each terminal and plate with terminals disconnected. Positive diodes should allow current to flow from terminal to plate, but not from plate to terminal. Negative diodes should allow current to flow from the plate to terminal, but not from terminal to plate.
- If current flows in both directions, the diode is shorted. If current does not flow in either direction, the diode is open. If any diode is defective, replace the entire diode assembly as individual diodes are not serviceable.