TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 384 of 890
TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION NO YES NO YES NO YES 2-290 Change 1 STARTER CIRCUIT G1 DISCONNECT WIRE 14A AT THE NEUTRAL SAFETY SWITCH. TURN ROTARY SWITCH TO START. IS THERE BATTERY VOLTAGE AT WIRE 14A (THE NEUTRAL SAFETY SWITCH END)? NO SOLENOID CONTROL VOLTAGE PCB/DISTRIBUTION BOX WIRING ROTARY SWITCH NEUTRAL SAFETY SWITCH 1. STE/ICE-R TEST 89 (Page 2-750) 2. MULTIMETER Current flows to neutral safety switch before reaching solenoid. GO TO I, Page 2-298 G2 DISCONNECT WIRE 14B AT NEUTRAL SAFETY SWITCH. IS THERE CONTINUITY ACROSS NEUTRAL SAFETY SWITCH? (WIRE 14 TO WIRE 14) 1. STE/ICE-R TEST 91 (Page 2-752) 2. MULTIMETER If there is no continuity, then current will not flow through switch. VOLTAGE AVAILABLE ROTARY SWITCH OK NEUTRAL SAFETY SWITCH PCB/DISTRIBUTION BOX WIRING REPLACE NEUTRAL SAFETY SWITCH G3 DISCONNECT BODY CONNECTOR FROM PROTECTIVE CONTROL BOX/DISTRIBUTION BOX. IS THERE CONTINUITY FROM WIRE 14B AT NEUTRAL SAFETY SWITCH TO BODY CONNECTOR HARNESS SOCKET “A”? 1. STE/ICE-R TEST 91 (Page 2-752) 2. MULTIMETER An open wire here could have prevented current flow between PCB/distribution box and neutral switch. NEUTRAL SAFETY SWITCH OK PCB/DISTRIBUTION BOX WIRING REPAIR 14B OR REPLACE HARNESS G FROM E3, Page 2-284 GO TO G4, Page 2-292 DIAGNOSTIC FLOWCHART