TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-l 1 2-46. STEIICE-R TEST PROCEDURES (Cont’d) I DC CURRENT 0 TO 1,500 AMPS TEST #90 Description: Pre-Test Procedures: This procedure measures DC current in the range of 0 to 1,500 amps. The VTM is used as an ammeter with the decimal point in the right position. This test may be done with the vehicle/equipment operating. Test requires the use of the TK adapters and transducers. Typical Applications: Control Functions: l Alterator output l Average starter current l Battery current 9 Any DC current up to 1,500 amps Test Procedure: Possible Error Messages: 1. 2. 3. 4. 5. 6. 7. 8. Connect test probe cable W4. Attach Pl to J2 or J3. Connect the current probe to P2. Set TEST SELECT switch to 90. Clamp probe to de-energized wire. Press and hold TEST button until CAL appears on display. Release TEST button and wait for offset value to appear on display. If offset is within 225 to -225, proceed. If not, go to DCA Troubleshooting Procedure. Energize circuit. Press and release TEST button. Observe displayed value. A negative reading indicates the probe is backwards. Reverse and repeat from Step 4. Run confidence test. 01, 02, 03,04.06 EOO2 Transducer not connected. EOOS Offset not performed. 2-507