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 TM
9-2350-238-20-2
2-9.
TROUBLESHOOTING
INFORMATION
(CONT).
Table
2-3.
UNIT
TROUBLESHOOTING
(CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE
ACTION
ELECTRICAL
INSTALLATION
12.
VEHICULAR INTERCOMMUNICATION SYSTEM
OPERATES
INTERMITTENTLY
WHEN
THERE IS NO OUTSIDE INTERFERENCE.
Check continuity between amplifier and wiring harness, line disconnects and
driver's control box, a n d w i r i n g h a r n e s s . -
If
does
not
indicate
0
ohms,
repair
wiring
harness,
a.
refer
to
If multimeter indicates 0 ohms, refer to TM 11-2643 for
b.
AN/U1C-1
set
or
TM
11-5830-340-12
for
AN/V1C-1
(V)
set.
13.
ALL
CIRCUITS
IN
CAB
ARE
NOT
OPERATING
WHEN
MASTER
SWITCH
IS
ON.
Check
slip
ring
ground
for
bad
connection.
a.
Clean ground connections with crocus cloth
(item
6,
Make sure ground connections are tight.
b.
Troubleshoot
slip
ring
circuit,
refer
to
Electrical
Circuit
Symp-
tom
Index,
14. FILTER BYPASS INDICATOR IS OFF WHEN LEVEL WIND CIRCUITS ARE NOT
OPERATING.
Troubleshoot
filter
bypass
indicator
circuit,
refer
to
Electrical
Cir-
cuit
Symptom
Index,
15.
FILTER
BYPASS
INDICATOR
IS
NOT
OPERATING
WHEN
LEVEL
WIND
CIRCUITS
ARE
OPERATING
NORMALLY.
Troubleshoot
filter
bypass
indicator
circuit,
refer
to
Electrical
Cir-
cuit
Symptom
Index,
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