TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 275 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
48.
ONE OR MORE CAB CLEARANCE AND MARKER LAMPS NOT WORKING.
NOTE
• If all cab clearance and marker lamps do not work, go to malfunction 49.
• Blackout toggle switch must be set to NORMAL position and headlamp switch in
ON position when doing the following checks.
• It is assumed here that lamp at circuit 31D-BR and 31E-BR is working.
Apply similar troubleshooting technique for other lamp combinations.
1.
Remove bulb at circuit
31E-BR (para 3-93), and
go to step 2.
2.
Check for voltage at
12-volts dc
Replace bulb
Repair circuit
circuit 31E-BR terminal
nominal.
(para 3-93),
31E-BR (para
of lamp socket.
and go to
3-127). Install
step 3.
bulb (para
3-93), and go
to step 3.
3.
Remove bulb at circuit
31A-BR (para 3-93),
and go to step 4.
4.
Check for voltage at
12-volts dc
Replace bulb
Repair circuit
circuit 31A-BR
nominal.
(para 3-95),
31A-BR (para
terminal of socket.
and go to
3-127). Install
step 5.
bulb (para
3-93), and go
to step 5.
2-150
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