TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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KNOWN INFO POSSIBLE PROBLEMS DIAGNOSTIC FLOWCHART TEST OPTIONS REASON FOR QUESTION TEST OPTIONS REASON FOR QUESTION NO YES NO YES PROTECTIVE CONTROL BOX/DISTRIBUTION BOX 2-244 Change 1 BATTERIES OK LEAD 57B GROUND OK IGNITION SWITCH OK HARNESS WIRE 29A OK HARNESS WIRE 29C OK PARKING BRAKE SWITCH OK BODY HARNESS WIRES OK GLOWPLUG CONTROLLER OK ALTERNATOR OK HARNESS WIRE 2A OK PROTECTIVE CONTROL BOX BAD FROM 24, Page 2-242 GO TO 28, Page 2-246 NO PROTECTIVE CONTROL BOX OR DISTRIBUTION BOX FAULT FOUND. 25 26 27 VISUAL If LED does not stop cycling ON and OFF, that would indicate a glowplugs controller malfunction. AT ENGINE OPERATING TEMPERATURE, DOES LED 11 STOP CYCLING “ON” AND “OFF”? NOTE: LED 11 DOES NOT FUNCTION WITH DISTRIBUTION BOX. GO TO D1, Page 2-314 AND BEGIN TEST CHAIN AGAIN IF GLOW PLUG CONTROLLER IS REPLACED IS LED 11 CYCLING “ON” AND “OFF”? NOTE: LED 11 DOES NOT FUNCTION WITH DISTRIBUTION BOX. REPLACE PROTECTIVE CONTROL BOX VISUAL If LED is not cycling ON and OFF, that would indicate a protective control box (PCB) malfunction. TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS BATTERIES OK LEAD 57B GROUND OK IGNITION SWITCH OK HARNESS WIRE 29A OK HARNESS WIRE 29C OK PARKING BRAKE SWITCH OK BODY HARNESS WIRES OK ALTERNATOR OK HARNESS WIRE 2A OK PROTECTIVE CONTROL BOX OK GLOWPLUG CONTROLLER BAD