BATTERIES/CHARGING SYSTEM

Table 2-2. Electrical Troubleshooting (Cont) - TM-9-2320-289-34_67

/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual
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TM 9-2320-289-34 Table 2-2. Electrical Troubleshooting (Con’t) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 7. Trace yellow lead to outside air door switch. (See wiring diagram E-26) If there is voltage, replace “VENT-A/C” switch, (See paragraph 10-22) If there is no voltage, perform step 8. Step 8. Trace yellow lead to 12 volt air conditioner relay, (See wiring diagram E-26) If there is voltage, replace outside air door switch. (See paragraph 10-22) If there is no voltage, repair circuit. 2. ONE AIR CONDITIONER CONTROL INOPERATIVE (OTHER CONTROLS OPERATE) Step 1. Pull out air conditioner control panel. (See paragraph 10-22, REMOVAL, steps 2 and 3) Connect both battery negative cables. (See TM 9-2320-289-20) Check for voltage to inoperative switch. If there is voltage, disconnect both battery negative cables (see TM 9-2320-289-20) and replace switch, (See paragraph 10-22) If there is no voltage, trace circuit. (See wiring diagram E-26) BATTERIES/CHARGING SYSTEM 3. GENERATOR LIGHT REMAINS ON OR TURNS ON DURING OPERATION (ALL EXCEPT Ml 010 AND Ml 028 WITH 200 amp SYSTEM) Step 1. Test appropriate alternator. (See paragraph 4-2) 4. VOLTMETER IN RED (OVERCHARGE) ZONE (ALL EXCEPT Ml 010 AND Ml 028 WITH 200 amp SYSTEM) Step 1. Test appropriate alternator, (See paragraph 4-2) 5. VOLTMETER IN YELLOW (UNDERCHARGE) ZONE (Ml 010 AND Ml 028 WITH 200 amp SYSTEM) Step 1. Remove current/voltage regulator cover. (See paragraph 4-4) With key in “OFF” position, check voltage at current/voltage regulator “1“ terminal. If there is no voltage, repair circuit to front battery positive (+) terminal. (See wiring diagram E-10) If voltage is less than 12.0, perform step 2. If voltage is 12.0-12.6, perform step 3. 2-42

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