TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 385 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION Change 1 2-291 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). STARTER CIRCUIT Replace rotary switch, refer to (para. 4-7). Repair wiring or replace switch, refer to (para. 4-7). A B C D E F G H PCB/DISTRIBUTION BOX BODY CONNECTOR The connections for the neutral safety switch can be reached by removing the engine cover. The connections are near the gear shift lever. 0-4500 OHMS STE/ICE-R TEST 91 1. Connect RED clip and BLACK clip to the terminations indicated 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.” 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. Disconnect negative battery cable before disconnecting and reconnecting protective control box/distribution box harness. There is battery voltage at the PCB/distribution box at all times. Failure to disconnect battery cable will result in damage to equipment or injury to personnel. WARNING