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 227 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
33.
NO POWER AT 12-VOLT CIRCUIT BREAKERS CB-2, CB-3, AND/OR CB-4 (Continued).
7.
Check for voltage at
12-volts dc Go to step 8.
Refer to mal-
circuit 10-RD terminal
nominal.
function 18.
of battery.
8.
Check for voltage at
12-volts dc Go to step 9.
Repair circuit
circuit 1OF-RD of
nominal.
1OF-RD, 1bE-RD,
relay RY-9.
and/or 10-RD
(para 3-127).
Install circuit
breaker bracket
(para 3-114).
NOTE
Ignition switch must be in ON position when doing the following checks.
9.
Check for voltage at
12-volts dc Go to step 10.
Replace relay
circuit 12C-RD ter-
nominal.
RY-9 (para
minal of relay RY-9.
3-115). Install
circuit breaker
bracket (para
3-114).
10.
Check for voltage at
12-volts dc Go to step 11.
Repair circuit
circuit 12C-RD ter-
nominal.
12C-RD (para
minal of circuit
3-127). Install
breaker CB-3.
circuit breaker
bracket (para
3-114).
11.
Check for voltage at
12-volts dc
Circuit
Go to step 12.
circuit 38-LG terminal
nominal.
breaker CB-3
of circuit breaker
is OK. Go
CB-3.
to step 14.
2-102
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