TM 9-2320-260-20
Table 2-4. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 4. Check for input power at fuel pump.
Step 1. Set multimeter to a range that will measure 24 volts.
Step 2. Disconnect lead 25 at fuel pump.
Step 3. Touch positive lead of multimeter to contact end of lead 25.
Step 4. Touch negative lead of multimeter to frame ground. Voltage should be present.
a. If voltage is present, go to test 5.
b. Repair or replace lead 25 if voltage is not present (para. 4-52).
Test 5. Check fuel pump for proper operation.
Refer to Mechanical Troubleshooting, table 2-2, malfunction 71.
Test 6. Check for power input at personnel heater.
Step 1. Set multimeter to a voltage that will measure 24 volts.
Step 2. Disconnect harness connector at personnel heater.
Step 3. Set heater control switch to RUN position.
Step 4. Set heater control switch to START position and hold.
Step 5. Set heater switch to HIGH position.
Step 6. Touch positive lead of multimeter to pin A of harness connector.
Step 7. Touch negative lead of multimeter to frame ground.
Step 8. Repeat steps 6 and 7 for pins B, C, and D. Voltage should be present at all pins tested.
a. Replace personnel heater if voltage is present (para. 14-2).
b. Repair or replace harness if voltage is not present at one or more pins (para. 4-52).
END OF TESTING!
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