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 199 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).
10
To prevent starter
motor from operating,
disconnect circuit
46E-BR from starter
solenoid.
NOTE
The start switch must be pushed and held when doing steps 11 thru 14.
11
Check for voltage at
12-volts dc
Go to step 11
Replace switch
circuit 55C-BR ter-
nominal
(para 3-75).
minal of start
switch.
12
Check for voltage at
12-volts dc
Go to step 12
Repair circuit
circuit 55C-BR ter-
nominal
55C-BR (para
minal of diode D-1
3-127).
13
Check for voltage at
12-volts dc
Go to step 13
Replace diode
circuit 55A-OR ter-
nominal
(para 3-116).
minal of diode D-1.
14
Check for voltage at
12-volts dc
Go to step 14
Repair circuit
circuit 55A-OR ter-
nominal
55A-OR (para
minal of hot engine
3-127).
indicator lamp socket.
15
Release and depress
Lamp lights
Go to step 15
Replace bulb
start switch, hot
(para 3-87).
engine indicator lamp
should light.
16
Remove circuit 55B-OR
Hot engine
Replace engine
Repair cir-
from engine temp-
indicator
temperature
cuits 55B-OR
erature switch, and
lamp lights
switch (para
and/or 55-OR
ground it to engine
3-100), and go
(para 3-127),
block
to step 17
+and go to step
17
2-74
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