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