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Table 2-2. Electrical Troubleshooting | Up
/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual | Next
Table 2-2. Electrical Troubleshooting (Con’t) |
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.
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