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 287 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

52.

ONE FRONT TURN SIGNAL LAMP NOT WORKING (Continued).

7.

Remove bulb from

socket, and go to

step 8.

8.

Check for voltage at

12-volts dc

Go to step 9.

Repair circuit

turn signal lamp

nominal.

36-PK (para

socket.

3-127). Install

headlamp assem-

bly (para

3-91). Install

turn signal

bulb (para

3-92).

NOTE

With positive lead at socket, check ground with negative lead when doing the

following checks.

9.

Check for voltage at

12-volts dc Go to step 10.

Clean and

circuit 99-WH ground

nominal.

tighten ground

point of junction

point connec-

block.

tion. Install

assembly (para

3-78). Install

turn signal

bulb (para

3-92).

10.

Check for voltage at

12-volts dc

Replace bulb

Repair circuit

circuit 99-WH terminal

nominal.

(para 3-92).

99-WH (para

of lamp socket.

Install head-

3-127). Install

lamp assembly

headlamp assem-

(para 3-91).

bly (para

3-91). Install

turn signal

bulb (para

3-92).

2-162