TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 DC VOLTAGE O TO 45 VOLTS TEST #89 Description: This procedure measures voltage in the range of -45 to 45 volts. The VTM is used as a DC voltmeter with the decimal point in the correct position. This test must be done with the component being tested turned on. Test requires the use of the TK adapters and transducers Typical Applications: ● Fuel Solenoid ● Starter Solenoid ● Alternator Output ● Any DC Voltage measurement Test Procedure: 1. Connect test probe cable W2. Attach P1 to J4. 2. Connect the desired test leads to P2. 3. Set TEST SELECT switch to 89. 4. Short leads together. Press and hold TEST button until CAL appears on display. 5. Release TEST button and wait for offset value to appear on display. 6. If offset is within -6.8 to 6.8 proceed. If not, go to DCA Troubleshooting Procedure. 7. Press and release TEST button. Observe displayed value. Pre-Test Procedures Run Confidence Test. Control Functions: 01,02,03,04,06 Possible Error Messages E005 Offset not performed. 2-750