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 197 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
26.
HOT ENGINE INDICATOR NOT WORKING (Continued).
2
Check for voltage at
12-volts dc
Install cir-
Troubleshoot
circuit 44-LB terminal
nominal
cuit breaker
CB-2 circuit.
of circuit breaker
bracket (para
(Refer to mal-
CB-2 3-114), and go
function 33).
to step 3.
3
Check for voltage at
12 volts dc
Go to step 4
Repair circuit
circuit 44-LB ter-
nominal
44-LB (para
minal of engine
3-127).
temperature 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
circuit 44J-LB ter-
12 volts dc
Go to step 8
Repair circuits
minal of hot engine
nominal
44H-LB and/or
indicator lamp socket
44J-LB (para
3-127)
NOTE
With positive lead on circuit 44J-LB (or other suitable 12-volt source), check ground with negative lead
when doing the following checks.
8
Check for voltage at
12-volts dc
Go to step 9
Tighten and/or
circuit 98F-BK ground
nominal
clean connec-
point of instrument
tion.
panel.
2-72
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