TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 261 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION Change 1 2-177 ENGINE COOLING Replace time delay module, refer to (para. 4-31). Replace time delay module, refer to (para. 4-31). When checking coil resistance, use an analog type multimeter. For an accurate ohms reading, perform this check when the system is at room temperature. Heat will increase resistance, resulting in a higher ohms reading. Replace the control valve, refer to (para. 8-26). CONTINUITY (RESISTANCE) MULTIMETER 1. Set the voltmeter to an ohms scale of about 1000 ohms. 2. Connect the RED and BLACK leads to the connections stated in the question. 3. Be sure to read the correct scale. Less than 5 ohms indicates continuity. For an open circuit, the meter should peg full scale (needle all the way to the left).