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 235 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
34.
NO POWER AT 12-VOLT CIRCUIT BREAKERS CB-1, CB-5, CB-6, AND/OR CB-7.
1.
Check for voltage at
12-volts dc
Go to step 2.
Refer to mal-
circuit 10-RD terminal
nominal.
function 18.
of battery.
2.
Remove circuit breaker
bracket far enough to
access circuit breaker
CB-1 (para 3-114), and
go to step 3.
3.
Check for voltage at
12-volts dc Go to step 4.
Repair circuits
circuit 1OC-PK terminal
nominal.
10-RD, IOB-PK,
of circuit breaker
and/or 1OC-PK
CB-1.
(para 3-127).
Install circuit
breaker bracket
(para 3-114).
4.
Check for voltage at
12-volts dc
Circuit breaker
Go to step 5.
circuit 25-OR terminal
nominal.
CB-1 is OK. Go
of circuit breaker
to step 7.
CB-1.
5.
Remove circuits 59-OR,
12-volts dc
Go to step 6.
Replace circuit
25-OR, and 15D-OR from
nominal.
breaker CB-1
circuit breaker CB-1,
(para 3-114).
and reset breaker.
Check for voltage at
circuit breaker
terminal.
2-110
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