Table 1. Indicator, Gauges, and Warning System Troubleshooting - continued

TM 9-2320-361-24-1

0014 00

INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd)

Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 1. Test input voltage to buzzer.

9. LOW AIR PRESSURE

WARNING SYSTEM

1. Turn power accessory switch

INOPERATIVE

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

1. If voltage is present, replace low air

ends of lead 85.

pressure buzzer (WP 0110 00).

2. If voltage is not present, go to

test 2.

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

1. If voltage is not present, go to

multimeter to frame ground.

test 3.

Connect positive lead of

2. If voltage is present, check

multimeter to pin B of low air

continuity of lead 85 connected

pressure switch. Battery

between pin B of low air switch and

voltage should be present.

buzzer.

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

1. If voltage is not present, repair or

frame ground and touch

replace lead 85.

positive lead to contact end

2. If voltage is present, replace low air

lead 85.

buzzer (WP 0110 00).

0014 00-16