Table 3-2. Unit Troubleshooting (Cont’d)

TM 9-2320-362-14&P Table 3-2. Unit Troubleshooting (Cont’d) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 5. ENGINE OIL PRESSURE GAGE DISPLAYS NORMAL READING AND STATUS INDICATOR ALARM AND LIGHT ARE ON (REFER TO FIGURES 3-1 THRU 3-3) Condition: HMMWV engine has been running 10 to 15 minutes. Both light and alarm tests on status indicator are normal. NOTE l When measuring voltage, measure against ground. l Normal engine oil pressure is 25-50 psi. l Before starting procedure, see para 1-1. Step 1. Disconnect cable W64 from connector 12J1 on tach/hourmeter box. Step 2. Using multimeter, measure voltage at connector 12J1, pin "C", on tach/hourmeter box. If multimeter displays correct voltage (fig 3-3), go to step 3. If multimeter does NOT display correct voltage (fig 3- 3), go to step 5. Step 3. Reconnect cable W64 to connector 12J1 on tach/hourmeter box. Disconnect cable W64 from connector on shelter. Step 4. Using multimeter, measure voltage at cable W64, pin “C.” If multimeter displays correct voltage (fig 3-3), refer to system manual for further troubleshooting. If multimeter does NOT display correct voltage (fig 3- 3), replace faulty cable assembly W64 (para 3-25). Step 5. Reconnect cable W64 to connector 12J1 on tach/hourmeter box . Remove engine access cover and disconnect safety lanyard. Disconnect cable W66 from connector 12J2 on tach/hourmeter box. Step 6. Using multimeter, measure voltage at cable W66, pin “C.” If multimeter displays correct voltage (fig 3-3), replace faulty harness assembly (para 3-20). If multimeter does NOT display correct voltage (fig 3- 3), go to step 7. 3-15