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 400 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11. TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

84.

DOME LAMP NOT WORKING.

NOTE

Blackout toggle switch must be set to NORMAL position and dome lamp

switch set to ON position when doing the following checks.

1.

Turn on map lamps.

Both light

Go to step 2

Go to step 4.

2.

Remove dome lamp bulb

(para 3-98), and go

to step 3.

3.

Check for voltage at

12-volt dc

Replace bulb

Repair circuit

circuit 15B-YL terminal

nominal.

(para 3-98).

15B-YL (para

of dome lamp.

3-127).

4.

Remove circuit breaker

bracket far enough to

access circuit breaker

CB-1 (para 3-114), and

go to step 5.

5.

Check for voltage at

12-volts dc

Go to step 6.

Reset circuit

circuit 15D-OR terminal

nominal.

breaker CB-1

of circuit breaker

and/or trouble-

CB-1.

shoot CB-1

to malfunction

34).

2-274