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 GLOW PLUGS CIRCUIT DIAGNOSTIC FLOWCHART KNOWN INFO T OPTIONS 1. STE/lCE-R TEST 89 (Page 2-506) 2. MULTIMETER GLOW PLUGS DON’T DRAW ANY CURRENT TURN ROTARY SWITCH TO STOP. IS THERE LESS THAN 0.5 VOLT AT GLOW PLUG WIRES? REASON FOR QUESTION There should not be voltage at glow plugs with switch off. POSSIBLE PROBLEMS GLOW PLUG CONTROLLER WIRING (OPEN CIRCUIT) 8 BAD GLOWPLUGS PCB t c2 1 TEST 1 KNOWN INFO OPTIONS 1. STEIICE-R TEST 89 (Page 2-506) 2. MULTIMETER NO SHORTS GLOW PLUGS DRAW ZERO AMPS TURN THE ROTARY SWITCH TO RUN. IS THERE LESS THAN 0.5 VOLT AT THE GLOW PLUG WIRES? POSSIBLE PROBLEMS REASON FOR QUESTION To see if power is getting to glow plugs. GLOW PLUG CONTROLLER BAD GLOW PLUGS PCB KNOWN INFO OPTIONS 1. STEIICE-R TEST 91 (Page 2-508) 2. MULTIMETER TURN ROTARY SWITCH TO STOP. MAKE SURE GLOW PLUG CONTROLLER IS CONNECTED. IS THERE CONTINUITY FROM SOCKET A TO SOCKET B OF PCB ENGINE CONNECTOR HARNESS ? NO SHORTS GLOW PLUGS DRAW NO CURRENT NO VOLTAGE AT GLOW PLUGS POSSIBLE PROBLEMS REASON FOR QUESTION Continuity indicates the harness and controller are ok. Noncontinuity indicates an open in the harness or controller. OPEN IN PCB OPEN IN GLOW PLUG CONTROLLER OPEN IN WIRING L - 2-298