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 321 of 926
TM 9-2320-283-20-1
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
63. BOTH BLACKOUT STOPLAMPS NOT WORKING (Continued).
10. Check for voltage at
12-volts dc
Go to step 11.
Replace black-
circuit 24D-PK ter-
nominal.
out toggle
minal of blackout
switch (para
toggle switch.
3-79).
Install
circuit breaker
bracket (para
3-114).
11. Remove relay RY-4
(para 3-112), and go
to step 12.
12. Check for voltage at
12-volts dc
Install relay
Repair circuit
circuit 24D-PK
nominal.
RY-4 (para
24D-PK (para
terminal of relay
3-112).
Install
3-127).
Install
RY-4.
circuit breaker
relay RY-4
bracket (para
(para 3-112).
3-114).
Install circuit
breaker bracket
(para 3-114).
13. Disconnect circuit
24-PK from 24A-PK at
connector, and go to
step 14.
14. Check for voltage at
12-volts dc
Repair circuit
Repair circuit
circuit 24-PK (pin N
nominal.
24A-PK (para
24-PK (para
of connector).
3-127).
3-127).
2-196
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