TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 307 of 890
2-222 Change 2 TM 9-2320-280-20-1 ALTERNATOR DIAGNOSTIC FLOWCHART F1 GO TO F4, Page 2-224 TEST OPTIONS Visual REASON FOR QUESTION Must know model of alternator to perform proper tests. TEST OPTIONS STE/ICE Test 10 and 89, (pages 2-734 and 2-750). REASON FOR QUESTION Determine if high or low output voltage. TEST OPTIONS STE/ICE Test 89, (page 2-750). REASON FOR QUESTION Wire 568A and wire 568 carry ignition current to turn on regulator. F3 F2 NO YES SEE NOTE ON OPPOSITE PAGE. IS THIS A NIEHOFF 100 AMP SINGLE VOLTAGE ALTERNATOR? START ENGINE AND ALLOW TO IDLE AT 1200-1500 RPM. RECHECK VOLTAGE OUTPUT. IS ALTERNATOR OUTPUT LESS THAN 26 VOLTS? STOP ENGINE. DISCONNECT WIRE 568A FROM ALTERNATOR WIRE 568. TURN ROTARY SWITCH TO “RUN”. MEASURE VOLTAGE AT THE WIRE THAT IS NOT CONNECTED TO THE ALTERNATOR. IS THERE BATTERY VOLTAGE? NO YES IF OUTPUT VOLTAGE IS OVER 30.5 VOLTS, REPLACE REGULATOR (Para. 12-22). NO YES NOTIFY DS MAINTENANCE TO REPAIR OR REPLACE WIRE HARNESS. F FROM B1, Page 2-205 KNOWN INFO VOLTAGE OUTPUT INCORRECT POSSIBLE PROBLEMS WIRING ALTERNATOR REGULATOR KNOWN INFO VOLTAGE OUTPUT INCORRECT POSSIBLE PROBLEMS WIRING ALTERNATOR REGULATOR