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 307 of 926

TM 9-2320-283-20-1

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

59. ONE REVERSE LAMP NOT WORKING.

NOTE

•-Ignition switch must be on, transmission shift control

lever in reverse (R), and blackout toggle switch in

NORMAL position when doing the following checks.

•·Faulty right reverse lamp is shown in this procedure.

Apply similar troubleshooting

technique for left reverse

lamp.

1.

Remove taillamp cover

(para 3-96), and go to

step 2.

2.

Check for voltage at

12-volts dc

Install tail-

Repair circuit

circuit 38G-OR terminal

nominal.

lamp cover

38G-OR (para

of taillamp.

(para 3-96),

3-127).

Install

and go to step

taillamp cover

3.

(para 3-96).

NOTE

With positive lead on circuit 38G-OR, check ground with

negative lead when doing the following checks. 3.

Remove lens and bulb from taillamp assembly (para 3-

96), and go to step 4.

4.

Check for voltage at

12-volts dc

Replace bulb

Clean socket

socket ground of

nominal.

(para 3-96).

connection, and

taillamp assembly.

install bulb

(para 3-96).

2-182