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 328 of 926

TM 9-2320-283-20-1

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

67.

ALL BLACKOUT LAMPS NOT WORKING.

NOTE

•-Headlamp switch must be in ON position and blackout

toggle switch in BLACKOUT position

when

doing

the

following checks.

•·It is assumed here that NORMAL lighting system is OK.

Check BLACKOUT lighting

Blackout

Blackout light-

Replace black-

system.

lamps light.

ing system OK.

out toggle

switch (para

3-79).

2-203