TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 392 of 1205
TM 9-2320-387-24-l INSTRUMENTS CIRCUIT DIAGNOSTIC FLOWCHART 1 TEST OPTlONS I KNOWN INFO 1. STE/lCE-R TESTS 89 (Page 2-906) 2. MULTIMETER FUEL GAUGE DOESNIT WORK DISCONNECT WIRE 27J FROM FUEL GAUGE. WITH THE ROTARY SWITCH IN THE RUN POSITION, DO YOU HAVE BAlTERY VOLTAGE AT WIRE 27J? REASON FOR QUESTlON Thii wire provides power for the gauge. POSSIBLE PROBLEMS GAUGE WIRING SENDING UNIT Eq TEST OPTlONS IS THERE CONTINUITY BETWEEN 1. STE/lCE-R TESTS 91 (Page 2-508) WIRE 58H AT THE FUEL GAUGE AND GROUND? 2. MULTlMETER KNOWN INFO POWER AVAILABLE TO THE GAUGE REASON FOR QUESTION If there is continuity, then the ground is OK POSSIBLE PROBLEMS GAUGE WIRING SENDING UNlT I T OPTIONS 1. STE/lCE-R TESTS 91 (Page 2-508) 2. MULTiMETER ES KNOWN INFO GAUGE GROUND OK RECONNECT WIRE 27J & DISCONNECT WIRE 28A AT THE GAUGE. IS THE RESISTANCE BETWEEN WIRE 28A AT FUEL GAUGE AND CHASSIS GROUND WITHIN 0 TO 35 OHMS? REASON FOR QUESTION If the resistance is OK the sense line is OK POSSIBLE PROBLEMS GAUGE WIRING SENDING UNIT 2-338