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 252 of 1176
TM 9-2320-361-24-1
0014 00
0014 00-16
INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd)
Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. LOW AIR PRESSURE
WARNING SYSTEM
INOPERATIVE
Test 1. Test input voltage to buzzer.
1. Turn power accessory switch
to OFF position.
2. Disconnect lead 85 from
buzzer.
3. Drain air pressure from air
tanks to less than 54 psi
(TM 9-2320-361-10). Close
drain valve.
4. Set multimeter to a voltage
range that will measure
24 VDC.
5. Turn power accessory switch
to ON position.
6. Connect negative lead to
frame ground.
7. Touch positive lead to contact
ends of lead 85.
Test 2. Test continuity of low air
pressure switch.
1. Turn power accessory switch
to OFF position.
2. Disconnect lead 85 from pin B
of low air pressure switch.
3. Turn power accessory switch
to ON position.
4. Connect negative lead of
multimeter to frame ground.
Connect positive lead of
multimeter to pin B of low air
pressure switch. Battery
voltage should be present.
Test 3. Test voltage into low air
switch.
1. Disconnect lead 85 at pin A of
low air switch.
2. Set multimeter to a voltage
range that will measure
24 VDC.
3. Connect negative lead to
frame ground and touch
positive lead to contact end
lead 85.
1. If voltage is present, replace low air
pressure buzzer (WP 0110 00).
2. If voltage is not present, go to
test 2.
1. If voltage is not present, go to
test 3.
2. If voltage is present, check
continuity of lead 85 connected
between pin B of low air switch and
buzzer.
1. If voltage is not present, repair or
replace lead 85.
2. If voltage is present, replace low air
buzzer (WP 0110 00).
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