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Diode Test

  1. Remove rectifier assembly from alternator. Set ohmmeter to X1 scale. Connect one ohmmeter probe to terminal screw. Connect other probe to each diode lead terminals in turn.
  2. Transpose probes and repeat test. All diodes should show readings of approximately 6-10 ohms in one direction and no needle movement with probes reversed. Repeat test for other set of diodes, moving first probe to other terminal screw. If meter readings are not as specified, replace rectifier assembly. X6STATOR GROUND TEST
  3. Remove stator from alternator. Set ohmmeter to X1000 scale. Connect one ohmmeter probe to any stator lead. Connect other probe to stator core. Ohmmeter indication should be infinity.
  4. If meter needle moves, stator winding is shorted to core and must be replaced. Repeat test for each stator lead. DO NOT touch probes or stator leads, as an incorrect reading will result.
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