TM-9-2320-362-14&P HMMWV Technical Manual Electrical Environmental System (EES) Download
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TM 9-2320-362-14&P Table 3-2. Unit Troubleshooting (Cont’d) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 12. SHELTER HAS NO POWER AND INCANDESCENT LAMP ON POWER INTERFACE BOX IS NOT LIT NOTE ● When measuring voltage, measure against ground. ● When measuring +28 VDC, use ± 2 VDC for tolerance. WARNING Serious injury could result if safety pre- cautions are not followed when troubleshooting this equipment. Step 1. Visually check circuit breaker on power interface box to ensure it is on. If circuit breaker is on, go to step 2. If circuit breaker is NOT on, go to step 4. Step 2. Using multimeter, measure voltage on power interface box terminals 11E4 and 11E5. If multimeter displays about +28 VDC, replace faulty power interface box (para 3-29). If multimeter does NOT display about +28 VDC, go to step 3. Step 3. Check voltage on battery terminals. If multimeter displays about +28 VDC, replace faulty power cables (para 3-30). If multimeter does NOT display about +28 VDC, replace faulty battery (TM 9-2320-280-20). Step 4. Remove power cables W68, W70, and W71 from terminals on power interface box. 3-25