TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 213 of 1176
TM 9-2320-361-24-1
0013 00
0013 00-1
FIELD TROUBLESHOOTING
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL)
LIGHTING AND WIPER SYSTEM TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. HEADLIGHT DOES
NOT OPERATE ON
LOW OR HIGH
BEAM, OR BOTH
HEADLIGHTS
INOPERATIVE
Test 1. Test headlamp connection
voltage.
1. Check for loose connection at
headlamp and wiring harness
and for broken headlamp.
2. Ensure body ground straps
are secure and clean.
1. Remove corrosion or dirt buildup
from ground lead connection.
2. Tighten screws connecting ground
strap to frame.
HI BEAM
INDICATOR
R.H. FRONT COMPOSITE LIGHT
PARK
TURN
B.O.
MARKER
L.H. FRONT COMPOSITE LIGHT
PARK
TURN
B.O.
MARKER
L.H. HEADLAMP
HI BEAM
17
LOW BEAM
18
91
R.H. HEADLAMP
HI BEAM
17
LOW BEAM
18
91
18
17
22
15
40
460 R.H. TURN
461 L.H. TURN
22/460
22/461
21
489
24
467A
467B
461/460
L.H. REAR COMPOSITE LIGHT
TAILLIGHT
STOP/TURN
B.O. TAILLIGHT
B.O. STOPLIGHT
R.H. REAR COMPOSITE LIGHT
TAILLIGHT
STOP/TURN
B.O. TAILLIGHT
B.O. STOPLIGHT
TURN
SIGNAL
CONTROL
A
B
C
FLASHER
POWER ACCESSORY SWITCH
491 PARK
21 TAILLIGHT
PANEL
LIGHTS
E
G
B
D
C
+24 VDC C
11
A
F
B
L
H
M
T
A
K
C
PANEL BRT
PANEL DIM
OFF
PARK
SERVICE
DRIVE
STOP
LIGHT
OFF
75 STOPLIGHT
75 STOPLIGHT
16 HEADLIGHTS
D
E
C
H
F
G
B
A
VAN BODY
B.O.
CLEARANCE
VAN BODY
CLEARANCE
H
L
Table 1. Lighting System Troubleshooting Procedures.
HORN
CIRCUIT
BREAKER
DIMMER
SWITCH
491
460-461
20-483-
484
491
460-461
20-483-
484
21
22-460-461
24
23
21
22-460-461
24
23
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