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 216 of 1176
TM 9-2320-361-24-1
0013 00
0013 00-4
LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. HEADLIGHT DOES
NOT OPERATE ON
LOW OR HIGH
BEAM, OR BOTH
HEADLIGHTS
INOPERATIVE
(Contd)
Test 3. Test lighting system harness
connector to voltage.
1. Turn main light switch lever to
OFF position.
2. Remove light switch assembly
from instrument panel
(WP 0101 00).
3. Disconnect harness connector
from light assembly
(WP 0101 00).
CAUTION
Voltage at pin F is tied directly to
battery without fuse protection. Insert
jumper wire in pin of faulty circuit
being tested first to prevent energized
jumper wire from touching ground and
damaging wire harness.
4. Check for battery voltage at
harness connector at pin F.
5. Check circuit 15 for loose
connections or broken wire.
6. Reconnect front wiring harness
connector to light switch and
reinstall light switch
(WP 0101 00).
1. If battery voltage is indicated at pin
F, connect a jumper wire from pin F
to socket pin of faulty circuit.
2. If lamps light with jumper wire
connected, replace main light switch
(WP 0101 00).
3. If battery voltage is not indicated,
go to step 5.
Repair broken wire.
MAL 1
TEST 3
STEP 4
MAIN LIGHT SWITCH
HARNESS CONNECTOR
SOCKET WIRE NO.
CIRCUIT
A
B
C
D
E
F
H
J
K
L
M
N
75
40
22
19
20–24
15
21
460–461
75
491
16
23
STOPLIGHT SWITCH
PANEL LIGHTS
DIRECTIONAL CONTROL
BLACKOUT (B.O.) DRIVING LIGHT
B.O. MARKER LIGHTS
BATTERY POSITIVE CABLE 24 VOLTS
SERVICE REAR LIGHTS
DIRECTIONAL INDICATOR
STOPLIGHT SWITCH
SERVICE PARKING LIGHTS
SERVICE HEADLIGHTS
B.O. STOPLIGHT
Table 1. Lighting System Troubleshooting Procedures (Contd).
N
H
J
F
E
M
D
C
L
B
A
K
Legend
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