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TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download

Page 168 of 890

TM 9-2320-280-20-1 REFERENCE INFORMATION Change 1 2-81 ELECTRICAL Replace rotary switch. Refer to (para. 4-7). Replace PCB. Refer to (para. 4-5). Replace distribution box. Refer to (para. 4-5.1). Repair or replace harness. Notify DS maintenance. 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. 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. DISCONNECT NEGATIVE BATTERY CABLE BEFORE DISCONNECTING AND RECONNECTING PROTECTIVE CONTROL BOX/DISTRIBUTION BOX HARNESS. WARNING