TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 239 of 1205
TM 9-2320-387-24-l ENGINE COOLING DIAGNOSTIC FLOWCHART TEST OPTIONS 1. STE/ICE-R TEST 91 (Page 2-508) 2. MULTIMETER REASON FOR QUESTlON KNOWN INFO FAN DRIVE OK FAN WON’T DISENGAGE CONTROL VALVE OK The need to test out the ground connection of the time-delay module and control valve. DISCONNECT THE 4-WIRE CONNECTOR ON THE TIMER. IS THERE CONTINUITY FROM WIRE 938 ON THE HARNESS SIDE OF THE 4-WAY CONNECTOR- TO-ENGINE,GROUND? PCSSIBLE PROBLEMS TIME-DELAY MODULE WIRING HYDRAULIC SYSTEM C6 t KNOWN INFO T OPTIONS 1. STEIICE-R TEST 91 (Page 2-508) , 2. MULTIMETER FAN DRIVE OK FAN WON’T DISENGAGE CONTROL VALVE OK RECONNECT THE 4-WIRE CONNECTOR. IS THERE ABOUT 580R FROM WIRE 938 ON THE TIMER SIDE OF THE 2-WIRE COUPLING TO ENGINE GROUND? POSSIBLE PROBLEMS REASON FOR QUESTION This measurement will help to tell you if the time-delay module is OK. TIME-DELAY MODULE WIRING HYDRAULIC SYSTEM TIME-DELAY I KNOWN INFO I I C7 I TEST OPTIONS IS THERE CONTINUITY FROM WIRE 458B IN THE 4-WIRE CONNECTOR HARNESS TO WIRE 4588 AT THE FAN TEMPERATURE SWITCH? 1. STUICE-R TEST 91 (page 2-508) 2. MULTIMETER FAN DRIVE OK FAN WONT DISENGAGE CONTROL VALVE OK 1 POSSIBLE PROBLEMS 1 REASON FOR QUESTION This measurement will help tell you if the trme-delay module is OK. TIME-DELAY MODULE WIRING HYDRAULIC SYSTEM 2-l 82