6-4. 200 AMPERE ALTERNATOR (A0013036AA) TESTING AND REPAIR (Cont' )
Reverse ohmmeter leads so the POSITIVE probe contacts the positive rectifier mount and the
zero) reading indicates defective rectifiers. Mount m ust be replaced.
Positive rectifiers are acceptacle if a LOW resistance reading is
noted in step 14.(b) and a HIGH resistance reading is noted in
step 14.(c) for each of the three rectifier leads.
Connect ohmmeter POSITIVE probe to a bare metal surface on the housing, and the NEGATIVE
probe to each of the three negative rectifier leads. HIGH resistance for any of the three rectifier
leads indicates defective rectifiers. Replace alternator.
Reverse test probes so NEGATIVE probe contacts the housing and the POSITIVE probe is
Negative rectifiers are acceptable if a LOW resistance reading is
noted for each rectifier lead in step 14.(d) and a HIGH resistance
reading is noted for each rectifier lead in step 14.(e).
Perform stator ground test as follows:
(a) Set ohmmeter to X10K scale and connect one probe to a bare metal surface on the housing and
the other probe to each of the three stator terminals.