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TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download

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7. Perform full-load test. Set test battery stand circuit selector to 24 VDC, IGN switch to ON, start varidrive, and set the 100A load bank switch to ON. Snap the load bank master switch to the ON position and adjust variable load control to 91±10 percent amp load. Observe the DC output readings. Refer to table 6-A.1 for diagnosis. 6-3.2. 100 AMPERE ALTERNATOR (12342944) TESTING AND REPAIR (Cont’d) TM 9-2320-280-34 6-18.18 Change 1 Table 6-A.1. Full-Load Test. AMPS VOLTS DIAGNOSIS High Low Test bench battery is discharged (or defective). Allow to charge (or replace). High Normal Charging system OK. High High STOP TEST. Regulator and/or tube assembly must be replaced. Refer to Static Testing. Low Low Alternator and/or regulator must be repaired or replaced. Refer to table 6-A.2. Low Normal Increase load. Low High STOP TEST. Test bench malfunction or wiring error.