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 335 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

74.

ALL 12-VOLT TRAILER CLEARANCE AND MARKER LAMPS NOT WORKING (Continued).

2.

Check for voltage at

12-volts dc

Connect circuit

Repair circuit

circuit 31B-BK (pin A

nominal.

31B-BK to

31B-BK (para

of connector).

31C-BK, and go

3-127).

to step 3.

3.

Disconnect 12-volt

trailer connector, and

go to step 4.

4.

Check for voltage at

12-volts dc

Recheck trailer

Repair circuit

circuit 31C-BK (pin 2

nominal.

clearance and

31C-B (para

of connector).

marker lamp

3-127).

circuit.

2-210