TM-9-2330-238-14
CHASSIS, SEMITRAILER: 6-TON, 4-WHEEL M295A1; SEMITRAILER, VAN: EXPANSIBLE, 6-TON, 4-WHEEL M313; SEMITRAILER, VAN: SHOP, FOLDING SIDES, 6-TON, 4-WHEEL M447 AND M447C; SEMITRAILER, VAN: REPAIR PARTS, SHOP EQUIPMENT, 6-TON, 4-WHEEL M749; SEMITRAILER, VAN: REPAIR PARTS STORAGE, 6-TON, 4-WHEEL M750
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1992
TM-9-2330-238-14 - Page 107 of 462
TM
9-2330-238-14
Table 4-2.
Organizational
Troubleshooting.
MALFUNCTION
TEST
OR INSPECTION
CORRECTIVE
ACTION
ELECTRICAL
SYSTEM
1.
ALL 24-VOLT
LAMPS
FAIL TO LIGHT
Step
1.
Check
to see if towing
vehicle
service
light switch
is in ON position.
Place
service
light switch
to ON position.
Step 2.
Check
wiring
harness
for short circuit.
Check
cable
for bare spots.
Repair
if necessary.
2.
ONE
OR MORE
24-VOLT
LAMPS
WILL
NOT LIGHT
Step
1.
Check for burned-out
lamp.
Replace
defective
lamp
(para 4-26, 4-28, 4-29, 4-30, 4-32, or 4-33).
Step 2.
Check for dirty or corroded
cable contacts
in sleeves
or lamp
sockets.
Remove
lamps
and clean contacts.
Step 3.
Check for loose
or broken connections.
Tighten,
repair, or replace
as necessary.
Step 4.
Check
to see if light assembly
is defective.
Replace
defective
light assembly
(para 4-26, 4-28, 4-29, 4-30, 4-32, or 4-33).
3.
24-VOLT
LAMPS
ARE DIM
OR FLICKERING.
Step
1.
Check for defective
lamp.
Replace
defective
lamp
(para 4-26, 4-28, 4-29, 4-30, 4-32, or 4-33).
Step 2.
Check for loose
ground
connection.
Clean
ground
cable
and tighten
connections.
Step 3.
Check for loose,
dirty, or corroded
terminals.
Clean
and tighten
terminals.
Step 4.
Check for dirty or corroded
lamp sockets,
cable
connectors,
or harness
contacts.
Clean
as necessary.
4.
DIRECTIONAL
SIGNAL
INOPERATIVE.
Step
1.
Check for defective
flasher
or switch
in towing
vehicle.
Refer to towing
vehicle
technical
manual
and replace
defective
part if necessary.
4-9
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