TM
55-1730-229-12
AC
320A0-OMM-000
TO
35C2-3-473-1
TM
1730-12/1
Table 4-2.
Organizational Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
43.
Step 11.
Shut down engine and disconnect battery. Open electrical trays
access door. Remove one wire from generator dc load resistor R4
(11, figure 4-25). Check resistance across load resistor terminals
(see FO-1).
a.
If resistance is between 4 and 6 ohms, reconnect wire to
resistor and do step 12.
b.
If resistance is not between 4 and 6 ohms, replace resistor
R4 (paragraph 4-34), and perform operational check.
Step 12.
Check wires P23B8 (between dc load resistor R4 and 2CB2) and P21D8N
(between dc load resistor R4 and dc ground stud) for continuity.
If no continuity, replace wire (P23B8 or P21D8N).
a.
b.
If continuity checks good, probable cause of fault is GCU.
The generator is also a possible cause of fault. Replace GCU
(paragraph 4-54), or notify maintenance supervisor.
c. Perform operational check.
Step 13.
Test CURRENT LIMIT SELECTOR switch 1S11 (see malfunction 79).
a.
Replace switch if defective (paragraph 4-104.b), and perform
operational check.
b.
If switch tests good, do step 14.
Step 14.
Remove battery charger access cover and disconnect main harness
connector P7 from control panel connector J7. Lower control panel
(see FO-6 sheet 2):
Check continuity
If no continuity,
replace wire no.
From
To
1S11B-6
J7-24R
XS1B20
1S11B-7
J7-24L
X50620
1S11B-8
J7-23R
X49B20
4-72
