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 I DIAGNOSTIC FLOWCHART ENGINE COOLING FAN ENGAGES CONTROL VALVE OK r OPTIONS 1. STUICE-R TEST 91 (Page 2-508) !. MULTIMETER REASON FOR QUESTION Wire 93 provides the time-delay module’s connection to ground. IS THERE CONTINUITY FROM WIRE 936 IN THE 4-WAY CONNECTOR TO ENGINE GROUND? I POSSIBLE PROBLEMS WIRING r KNOWN INFO . OPTIONS 1. STE/ICE-R TEST 91 (Page 2-508) 2. MULTIMETER FAN ENGAGES CONTROL VALVE OK IS THERE CONTINUITY OF ENGINE WIRING HARNESS WIRE 315B BETWEEN THE TIME-DELAY MODULE AND THE FAN CUT-OFF SWITCH? REASO’d FOR QUESTION POSSIBLE PROBLEMS The fan cut-off switch has some control of the engine fan. WIRING I 2. MULTIMETER KNOWN INFO FAN ENGAGES CONTROL VALVE OK IS THERE ABOUT ZERO VOLTAGE ON THE TIMER END OF WIRE 4586 WITH WIRE 458A DISCONNECTED FROM THE FAN TEMPERATURE SWITCH? REASON FOR QUESTION If wire 4588 is shorted to some other live wire, the fan will not engage. POSSIBLE PROBLEMS WIRING REPAIR/REPLACE OR HARNESS. 2-l 76