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 285 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.

NOTE

• Blackout toggle switch must be set to NORMAL position and turn signal switch

set for right turn.

• Faulty right front turn signal lamp is shown in this procedure. Apply similar

troubleshooting technique for left front turn signal.

1.

Disconnect circuit

36-PK from 36A-PK at

connector, and go to

step 2.

2.

Check for voltage at

12-volts dc

Connect 36-PK

Repair circuit

circuit 36-PK terminal

nominal.

to 36A-PK, and

36-PK (para

of connector.

go to step 3.

3-127).

3.

Disconnect circuit

36B-PK from circuit

36A-PK at connector,

and go to step 4.

4.

Check for voltage at

12-volts dc

Connect circuit

Repair circuit

circuit 36A-PK terminal

nominal.

36A-PK to

36A-PK (para

of connector.

36B-PK, and go

3-127).

to step 5.

5.

Remove headlamp

assembly far enough to

access junction block

(para 3-91), and go to

step 6.

6.

Check for voltage at

12-volts dc

Go to step 7.

Repair circuit

circuit 36B-PK terminal

nominal.

36B-PK (para

of junction block.

3-127). Install

headlamp assem-

bly (para

3-91).

2-160