Rectifier/Diode Assembly

Using an ohmmeter, check continuity of each diode in both directions (polarity). See Figure thru Figure . If diode shows high resistance in one direction and low resistance in other direction, diode is okay.
If diode shows low resistance in both directions, diode is shorted. If diode shows high resistance in both directions, diode is open. If any diode is defective, replace rectifier assembly.