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50.  12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING (145 AMP) (CONT) - TM-9-2320-364-20-2_828
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50.  12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING (145 AMP) (CONT). - TM-9-2320-364-20-2_830
TM 9-2320-364-20-2      2-1605 DOOR SHOWN REMOVED FOR CLARITY ALTERNATOR POS (+) TERMINAL WIRE 1820 WIRE 1278 LOCKWASHER NUT FAN CONTROL SWITCH HEADLIGHT SWITCH ENGINE SWITCH (1)   Remove nut, lockwasher and wires 1820 and 1278 from alternator positive terminal.  Discard lockwasher. (2)   Set multimeter select switch to volts dc. (3)   Connect positive (+) multimeter lead to the positive (+) terminal of the alternator. (4)   Connect negative (–) multimeter lead to known good ground. (5)   Start engine and turn on headlights and heater (TM 9-2320-364-10). (a)   If at least 26 vdc are not present, turn off heater, headlights and engine and go to Step 4 of this Fault. (b)   If at least 26 vdc are present, turn off heater, headlights and engine.   Repair wire 1278 (see schematic Fig 2-39) or notify DS Maintenance. (6)   Install wires 1278 and 1820 on alternator positive (+) terminal with lockwasher and nut. VOLTAGE TEST Remove all jewelry such as rings, dog tags, bracelets, etc.  If jewelry or tools contact positive electrical circuits, a direct short may result.  Damage to equipment, injury or death to personnel may occur. Alternator is capable of producing over 40 vdc.  Be careful when taking a voltage reading not to get shocked. NOTE DUVAC controller resets to the 24 vdc charge mode approximately every 55 seconds.  Take the voltage reading for at least a minute to make sure voltage reading is taken during the 24 vdc charge mode. Tag and mark all wires prior to removal.

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