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 264 of 1176

TM 9-2320-361-24-1

0015 00

0015 00-8

HEATING SYSTEMS TROUBLESHOOTING (Contd)

Table 1. Heating Systems Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. HOT WATER

PERSONNEL HEATER

DOES NOT OPERATE

OR DOES NOT

OPERATE IN LOW

POSITION (Contd)

Test 4. Test personnel heater for

power input.

1 Ensure heater switch is in

high position.

2. Set multimeter to a range

that will measure 24 VDC.

3. Disconnect lead 400 from

personnel heater.

4. Touch multimeter positive

lead to contact end of lead

400.

5. Touch multimeter negative

lead to frame ground. Voltage

should be present.

Test 5. Test blower motor resistor.

1. Set multimeter to RX 1.

2. Ensure heater switch is set to

low position.

3. Touch positive lead of

multimeter to one lead on

resistor.

4. Touch negative lead of

multimeter to the other end

of resistor.

1. If voltage is not present, repair or

replace lead 400 (WP 0090 00).

2. If voltage is present, and personnel

heater fails to operate, replace

personnel heater (WP 0250 00).

If resistance is not within tolerance of

4.5 ohms and 5.5 ohms, replace

resistor (WP 0117 00).

TEST 4

STEPS 4

AND 5

LEAD

400