TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 835 of 1313
TAIL AND MARKER LIGHTS INOPERATIVE - Continued
STEP
6.
IS WIRING HARNESS IN GOOD CONDITION?
a.
Place battery switch to OFF position.
L
K
H
C
M
T0768DAA
B
A
N
E
F
Figure 6.
Main Lighting Switch Connector.
b.
Visually check wiring harness for loose connections or broken wiring. Refer to point to point schematic.
CONDITION/INDICATION
IS WIRING HARNESS IN GOOD CONDITION?
DECISION
NO - Repair or replace broken wire (Volume 3, WP
0352). Go to Step (8) to verify problem is solved.
YES - Notify supervisor. Action may not be possible at this level of maintenance.
STEP
7.
IS MAIN LIGHT SWITCH OPERATING PROPERLY?
a.
Place battery switch to OFF position.
L
K
H
C
M
T0768DAA
B
A
N
E
F
Figure 7.
Main Lighting Switch Connector.
b.
Connect jumper cable from socket pin F to socket pin H. Refer to point to point schematics.
c.
Place battery switch to ON position.
NOTE
If non-operating tail and marker lights illuminates, lighting switch is not operating
properly.
d.
Look for lighted tail and marker lights.
TM 9-2320-272-23-1
0096
0096-6
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