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 245 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
35.
NO POWER AT 24-VOLT CIRCUIT BREAKERS CB-8 AND/OR CB-9.
1.
Check for voltage at
24-volts dc
Go to step 2.
Refer to mal-
starter solenoid main
nominal.
function 18.
battery cable
connection.
2.
Check for voltage at
24-volts dc
Go to step 3.
Repair circuit
circuit 46C-YL terminal
nominal.
46B-YL and/or
of starter relay.
46C-YL (para
3.
Remove circuit breaker
bracket far enough to
access circuit breaker
CB-8 (para 3-114), and
go to step 4.
4.
Check for voltage at
24-volts dc
Go to step 5.
Repair circuit
circuit 18-YL terminal
nominal.
18-YL (para
of circuit breaker
3-127).
Install
CB-8.
circuit breaker
bracket (para
3-114).
5.
Check for voltage at
24-volts dc
Circuit breaker
Go to step 6.
circuit 18A-TN terminal
nominal.
CB-8 is OK.
Go
of circuit breaker
to step 8.
CB-8.
6.
Remove circuit 18A-TN
24-volts dc
Go to step 7.
Replace circuit
from circuit breaker
nominal.
breaker CB-8
CB-8, and reset
(para 3-114).
breaker.
Check for
voltage at circuit
breaker terminal.
2-120
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