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Diode Test

  1. Remove rectifier assembly from alternator. Set ohmmeter on "x1" scale. To test one set of diodes, contact one ohmmeter probe to terminal screw and contact each of 3 stator lead terminals with other probe.
  2. Reverse probes and repeat test. All diodes should show readings of approximately 6 ohms in one direction and infinite readings with probes reversed.
  3. Repeat test for other set of diodes, moving first probe to other terminal screw. If meter readings are not as specified, replace rectifier assembly.
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