Quantcast 50.  12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING (145 AMP) (CONT). - TM-9-2320-364-20-2_830

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Page Title: 50. 12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING (145 AMP) (CONT).
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VOLTAGE TEST - TM-9-2320-364-20-2_829
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CONTINUITY TEST - TM-9-2320-364-20-2_831
TM 9-2320-364-20-2 2-1606 50.  12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING (145 AMP) (CONT). Both voltmeters indicate low   charge. Batteries OK. Fuel pump operates indicating   24 vdc present at DUVAC   controller IGN terminal. Alternator belts OK. DUVAC controller OK. Wire 1278 OK. Wire 1275 from alternator   negative (–) terminal to battery   negative faulty. Jumperwire from alternator field   coil negative terminal to   alternator negative (–) terminal   faulty. Alternator faulty. Wire 1344 between alternator   and regulator faulty. Brown wire between DUVAC   controller and regulator   faulty. Wire 1435 between DUVAC   controller and ground faulty. Black wire between regulator   and ground faulty. Wire 1274 between DUVAC   controller and batteries faulty. Red wire between DUVAC   controller and regulator faulty. Orange wire between DUVAC   controller and regulator faulty. Regulator faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If alternator is not grounded through wire 1275, alternator will not charge. YES NO Repair wire 1275 (see schematic Fig 2-39) or notify DS Maintenance.  Verify repair, go to Step 14 of this Fault. 4. Is continuity measured between wire 1275 and a known good ground? WARNING Read   WARNING on Page 2-1607

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