TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 6-4. 200 AMPERE ALTERNATOR (A0013036AA) TESTING AND REPAIR (Cont’d) (c) Reverse ohmmeter leads so the POSITIVE probe contacts the positive rectifier mount and the NEGATIVE probe contacts each of the three rectifier leads. LOW resistance (zero or close to zero) reading indicates defective rectifiers. Mount m ust be replaced. NOTE 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. (d) 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. (e) Reverse test probes so NEGATIVE probe contacts the housing and the POSITIVE probe is connected to each of the three rectifier leads. LOW resistance indicates defective rectifiers. Replace alternator. NOTE 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). 15. 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. 6-25