TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download

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TM 9-2320-387-24-l REFERENCE INFORMATION FUEL SYSTEM 0 II . . WARNING Keep hands away from engine fan. Moving fan blades can cause serious injury. Use extreme caution when engine is running. 0 II . . WARNING Disconnect negative battery cable before disconnecting and reconnecting protective control box harness. WARNING There is battery voltage at the PCB at all times. Failure to disconnect battery cable will result in damage to equipment or injury to personnel. Rotary switch must remain in STOP position for the rest of these tests. REAR OF ROTARY SWfTCH NOTE Carefully inspect the body connector end of the harness for a short. Check for pushed out pins, broken or stripped insulation, or any other bare wires. If everything checks out OK, you have to replace the harness. Remember to reconnect any wires that may have been disconneded during troubleshooting. Repair harness (para. 4-80). DC VOLTAGE O-45 VOLTS STEIICE-R TEST 89 1. Connect RED clip to positive, BLACK clip to negative or ground. 2. Start Test 89. DC Volts. 3. Displayed reading is in volts. DC VOLTAGE MULTIMETER 1. Set the voltmeter to a DC volts scale of at least 40 volts. 2. Connect the RED lead to positive and the BLACK lead to negative. 3. Be sure to read the correct scale. INJECTfCN PUMP Replace rotary switch (para. 4-10). 2-l 29