Tester C-3829 Method

Remove alternator brushes and through bolts. Separate rectifier end housing and stator from drive end housing and rotor, then proceed as follows:

1. To test positive rectifiers, position stator assembly on an insulated surface and connect test lead clip to alternator "BAT" terminal and plug tool into 110 volt A.C. power supply. Touch probe to bare wire connection of each rectifier.
   CAUTION: Do not break sealing around rectifier lead wire or on inner end of rectifier as this will accelerate corrosion.
2. To test negative rectifiers, connect test tool lead clip to rectifier end housing and touch bare wire connection of each rectifier with probe.
3. Good rectifiers will produce a reading of 13A amperes or more and will be approximately same for the three rectifiers tested. If two rectifiers are good and one is shorted, reading on good rectifiers will be low and shorted rectifier will read zero. With bad rectifier disconnected, reading on other two rectifiers will be good. If one rectifier is open, its reading will be approximately one ampere and other two rectifiers will show a good reading. Positive and negative rectifiers will read on opposite side of scale.