Rectifier Assembly Test

Remove the rectifier assembly from the alternator. Place the ohmmeter, Rotunda 059-00010 or equivalent, Multiply-By setting at 1 and calibrate the meter.

NOTE: Text values shown in brackets [ ]___ are referenced to Rotunda Model 059-00010 and may be different if another tester is used.

CAUTION: Digital meters cannot be used to perform these tests.

1. To test the positive diodes, contact one probe to one of the rectifier assembly B+ blade terminals and contact each of the three stator terminals with the other probe. Reverse the probes and repeat the test. All diodes should show a low reading of approximately [7]___ohms in one direction and an infinite reading (no needle movement) with the probes reversed. This reading may be checked against a good rectifier if one is available.









2. Perform the preceding tests for the negative diodes by contacting the rectifier assembly base plate and the three stator terminals.
3. If the meter readings are not as specified, replace the rectifier assembly.