TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0014 00 0014 00-7 INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd) Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. FUEL GAUGE INOPERATIVE (Contd) Test 4. Test continuity of lead 28. 1. Turn power accessory switch to OFF position. 2. Disconnect lead 28 from fuel gauge and from fuel level sending unit. 3. Connect jumper wire from fuel level sending unit end of lead 28 to frame ground. 4. Set multimeter to RX 1 scale. 5. Connect negative lead of multimeter to frame ground and touch positive lead of multimeter to contact of lead 28. Test 5. Test continuity of fuel level sending unit. 1. Set multimeter to RX 1 scale. 2. Connect multimeter leads to fuel sending unit. 3. Position float in empty position. 4. Set multimeter to RX 10 scale. 5. Position float in full position. 1. If continuity is present, reconnect lead 28 and recheck fuel gauge operation. 2. If continuity is not present, repair or replace wiring (WP 0090 00). 1. If resistance is 0.00–0.50 ohms, go to step 4. 2. If resistance is not 0.00–0.50 ohms, replace fuel sending unit (WP 0109 00). 1. If resistance is 29.50–31.50 ohms, reinstall fuel level sending unit (WP 0109 00) and recheck gauge operation. 2. If resistance is not 29.50–31.50 ohms, replace fuel level sending unit. (WP 0109 00). TEST 4 STEP 5 TEST 1 STEP 3 TEST 5 STEPS 3 AND 5 28 FUEL GAUGE 28 FUEL LEVEL SENDING UNIT