TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 REFERENCE INFORMATION Change 1 2-339 It is important to connect the leads as indicated because you are checking continuity across a diode. The lamp will glow dimly because you are supplying a small amount of power thru STE/ICE-R. You may have to shade the lamp with your hand to see if it glows. NOTE A multimeter may not supply enough power to light the lamp. In this case look for a much greater resistance when measuring with the leads connected in one direction than when they are connected in reverse. BATTERY 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. 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). C BODY CONNECTOR BRAKE WARNING LAMP 27 27L 27P 27D 27F 27K 67 67D PROTECTIVE CONTROL BOX 67B 67C 67E 79A 67A PRESSURE SWITCH PARK BRAKE SWITCH INSTRUMENTS CIRCUIT Replace harness/or repair wiring, refer to (para. 4-85). Replace brake warning lamp, refer to (para. 4-17). 0-45 DC VOLTS STE/ICE-R TEST 89 1. Connect RED clip to the indicated test point, BLACK clip to negative or ground. 2. Start Test 89, DC volts. 3. Displayed reading is in volts. 0-4500 OHMS STE/ICE-R TEST 91 1. Connect RED clip and BLACK clip to the indicated terminals in the question. RED to the first, BLACK to the second. 2. Start Test 91, 0-4500 ohms. 3. Displayed reading is in ohms. Less than 5 ohms is continuity. If the resistance is over 4500 ohms, STE/ICE displays “9.9.9.9.” PROTECTIVE CONTROL BOX/ DISTRIBUTION BOX