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 257 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
40.
INSTRUMENT PANEL GAGE LAMP OR LAMPS NOT WORKING (Continued).
2
Check for voltage at
12-volts dc
Go to step 3
Repair circuit
circuit 29E-BR terminal
nominal
29E-BR and/or
of clearance lamp
29-BR (para
3
Check for voltage at
12-volts dc
Go to step 4
Repair circuit
circuit 29F-BR terminal
nominal
29F-BR (para
of ether lamp
3-127).
4
Check for voltage at
12-volts dc
Go to step 5
Repair circuit
circuit 29G-BR terminal
nominal
29G-BR (para
of tachograph
3-127).
5
Check for voltage at
12-volts dc
Instrument
Repair circuit
circuit 29K-BR terminal
nominal
panel lamp
29H-BR (para
of oil pressure lamp
circuit OK
3-127).
6
Check for voltage at
12-volts dc
Go to step 7
Repair circuit
circuit 29Q-BR terminal
nominal
29Q-BR and/or
of fuel gage
29N-BR
(para
7
Remove bulb from socket
(para 3-73), and go to
step 8.
8
Check for voltage at
12-volts dc
Replace bulb
Clean lamp
circuit 29Q-BR socket
nominal
(para 3-73)
socket connec-
of fuel lamp
tion.
2-132
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