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 230 of 1176
TM 9-2320-361-24-1
0013 00
0013 00-18
LIGHTING AND WIPER SYSTEM TROUBLESHOOTING (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. ALL STOPLIGHTS
ARE INOPERATIVE
Test 1. Check stoplight switch for
input voltage.
1. Turn main light switch to
SERVICE DRIVE position.
2. Set multimeter to voltage
range that will measure
24 VDC.
3. Disconnect lead 75 input
voltage from stoplight switch.
4. Touch positive lead of
multimeter to contact end of
lead 75.
5. Touch negative lead of
multimeter to frame ground.
Test 2. Check stoplight switch for
output voltage.
1. Set multimeter to voltage
range that will measure
24 VDC.
2. Disconnect output lead 75 from
stoplight switch.
3. Touch positive lead of
multimeter to contact end of
stoplight switch.
4. Touch negative lead of
multimeter to frame ground.
5. Depress brake pedal.
6. Place main light switch in OFF
position.
7. Set multimeter to RX 1 scale.
8. Place positive lead of
multimeter in pin A of wiring
harness.
9. Place negative lead on input
lead 75 at stoplight switch.
NOTE
If vehicle is equipped with hydraulic
stoplight switch and switch is
defective, replace air-activated
stoplight switch conversion kit, part
number 12255668.
1. If voltage is present, go to test 2.
2. If voltage is not present, go to
WP 0013 00, table 1, malfunction 1,
test 3. Depress brake pedal and
check lead 75.
If voltage is not present, and
stoplights are still inoperative, go to
step 6.
1. If continuity is present, replace
stoplight switch (WP 0112 00).
2. If continuity is not present, repair or
replace wire or wiring harness.
Table 3. Directional Signal Systems Troubleshooting Procedures (Contd).
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