TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 351 of 1205
TM 9-2320-387-24-l GLOW PLUGS CIRCUIT DIAGNOSTIC FLOWCHART I KNOWN INFO I GLOW PLUG CURRENT OK NOT CYCLING PROPERLY KNOWN INFO I SLOW PLUG CURRENT OK SLOW PLUGS NOT CYCLING SLOW PLUGS DRAW CURRENT WITH CONTROLLER DISCONNECTED POSSIBLE PROBLEMS WIRING SHORT PCB (GLOW PLUG POWER RELAY) 1 Bl [ - TEST OPTIONS TURN ROTARY SWITCH TO STOP. 1. STE/lCE-R TEST 80 (Page 2-505) DISCONNECT GLOW PLUG CONTROLLER. TURN ROTARY SWITCH TO RUN. DO GLOW PLUGS STILL DRAW CURRENT? 2. MULTlMElER REASON FOR QUESTION If the glow plug controller is shorted, the glow plug power relay &GE9 in the PCB will always be closed- MEASURE VOLTAGE AT SOCKET 6 OF GLOW PLUG CONTROLLER CONNECTOR HARNESS. IS THERE BATTERY VOLTAGE AT THIS SOCKET? r OPTIONS 1. STEXE-R TEST 89 (Page 2-508) 2. MULTIMETER REASON FOR QUESTION If there is a short in the harness, this wire will have battery voltage. I SHORT IN ENGINE CONNECTOR HARNESS. REPAIR OR REPLACE HARNESS. - 2-296