Tool C-38***29A Method (Negative Rectifiers)
- Remove alternator brushes and through bolts. Separate rectifier end shield and stator from drive end shield, pulley and rotor.
- Connect test lead clip to rectifier end housing. Touch metal strap of each negative rectifier with test probe. Test specifications and results will be approximately the same as for positive rectifiers, except meter will read on opposite side of scale.
NOTE:
If negative rectifier shows shorted, remove stator from rectifier end shield and retest. Stator winding could be grounded to stator laminations or end shield. This would indicate a shorted negative rectifier.