TM 55-1730-229-12
AG 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
Organizational Troubleshooting (continued)
Table 4-2.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
39.
c. If light does not come on, continue operation as required.
When operation is complete, disconnect battery and remove
thermometer.
NOTE
Do steps 2 through 4 as quickly as possible before system cools
down.
Check
Step 2.
Shut down engine.
Disconnect battery and lower control panel.
thermometer.
If thermometer indicates less than 155F, go immediately to
a.
step 3.
b.
If thermometer indicates 155F or higher, allow system to
cool before operating. Continued operation could damage ECU.
Step 3.
Disconnect main harness connector P12 (36, figure 4-38) from
generator control unit. Check resistance between pins G and H Of
harness connector P12 (see FO-6 sheet 1).
a.
If continuity between pins G and H of P12, the thermal
switch in generator is closed, indicating an overtemp
condition. If unit has been recently run with heavy ac load,
allow unit to cool before operating. If unit has not been
run with ac load, generator is defective. Notify maintenance
supervisor.
If resistance between pins G and H of P12 is greater than
b.
10K, reconnect P12 to GCU, and do step 4.
Step 4.
Remove battery charger access cover. Disconnect main harness
connector P5 from control panel connector J5 (see FO-3 sheet 2).
Check for open circuit between pins 10L and 6L of P5.
a. If continuity between pins 10L and 6L of P5, replace
compartment temperature switch S1 (paragraph 4-32).
b. If open circuit between pins 10L and 6L of P5, replace GCU
4-63
