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 215 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
31.
INSTRUMENT PANEL GAGES NOT WORKING.
1.
Remove circuit breaker
bracket far enough to
access circuit breaker
CB-2 (para 3-114), and
go the step 2.
NOTE
Ignition switch must be in ON position and battery power connected when doing
the following checks
2.
Check for voltage at
12-volts dc
Install cir-
Reset circuit
circuit 44-LB terminal
nominal.
cult breaker
breaker CB-2
of circuit breaker
bracket (para
and/or trouble-
CB-2.
3-114), and go
shoot CB-2 cir-
to step 3.
cuit. (Refer
to malfunction
33).
3.
Check for voltage at
12-volts dc Go to step 4.
Repair circuit
circuit 44-LB ter-
nominal.
44-LB (para
minal of water temp-
3-127).
erature gage.
4.
Check for voltage at
12-volts dc Go to step 5.
Repair circuit
circuit 44A-LB ter-
nominal.
44A-LB (para
minal of fuel gage.
3-127).
5.
Check for voltage at
12-volts dc Go to step 6.
Repair circuit
circuit 44B-LB ter-
nominal.
44B-LB (para
minal of voltmeter.
3-127).
6.
Check for voltage at
12-volts dc Go to step 7.
Repair circuit
circuit 44C-LB ter-
nominal.
44C-LB (para
minal of transmission
3-127).
oil temperature gage.
7.
Check for voltage at
12-volts dc Go to step 8.
Repair circuit
circuit 44D-LB ter-
nominal.
44D-LB (para
minal of engine oil
3-127).
pressure gage.
2-90
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