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 ENGINE COOLING DIAGNOSTIC FLOWCHART - KNOWN INFO T OPTIONS TRY IT. FAN DRIVE OK FAN DOESN’T ENGAGE VIA 458 DISCONNECT THE CONTROL VALVE ELECTRICAL CONNECTOR AT THE TIME-DELAY MODULE. DOES THE FAN ENGAGE? POSSIBLE PROBLEMS REASON FOR QUESTION With no power to the solenoid, the fan should engage. FAN WIRING TIME-DELAY MODULE FAN CONTROL VALVE PCB REPLACE CONTROL I r OPTIONS KNOWN INFO DISCONNECT THE 4-WIRE CONNECTOR AT THE TIME-DELAY MODULE. IS THERE CONTINUITY FROM 4588 AT THE 4-WIRE HARNESS TO 458B AT THE FAN TEMPERATURE SWITCH? 1. STE/ICE-R TEST 91 (Page 2-508) 2. MULTIMETER REASON FOR QUESTION Wire 4566 connects the switch and the timer. FAN ENGAGES CONTROL VALVE OK POSSIBLE PROBLEMS WIRING REPAIR/REPLACE 7 1 STE/ICE-R TEST a9 (Page 2-506) 2. MULTIMETER KNOWN INFO WITH THE ROTARY SWITCH IN RUN, IS THERE BATTERY VOLTAGE AT WIRE 5838 IN THE TIME-DELAY MODULE 4 WIRE CONNECTOR? FAN ENGAGES CONTROL VALVE OK REASON FOR QUESTION Wire 5638 connects battery voltage to the delay module. POSSIBLE PROBLEMS WIRING REPAIWREPLACE