TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 293 of 890
TM 9-2320-280-20-1 ALTERNATOR 2-210 Change 1 C KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION If voltage exceeded 35 volts, regulator over-voltage protection has failed. DIAGNOSTIC FLOWCHART FROM C3, Page 2-208 NO YES REPLACE REGULATOR (Para 12-21) or (Para 12-22) KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION 1. STE/ICE-R Tests 10 and 89 (pages 2-734 and 2-750). 2. MULTIMETER Determine if alternator or regulator is defective. C4 WAS VOLTAGE READ IN STEP 5, ON PAGE 2-198, LESS THAN 35 VOLTS? C5 WITH REGULATOR REMOVED FROM ALTERNATOR, PERFORM FULL-FIELD TEST. START ENGINE AND SET SPEED TO 850 RPM. CONNECT A JUMPER WIRE FROM PIN E ON ALTERNATOR TO GROUND. MOMENTARILY WIRE JUMPER FROM PIN D TO BATTERY VOLTAGE. MEASURE VOLTAGE AT ALTERNATOR OUTPUT. DID VOLTAGE RISE TO AT LEAST 75 VOLTS? YES REPLACE ALTERNATOR (Para 12-23 ) or (Para 12-24) NO VOLTAGE OUTPUT INCORRECT WIRING OR IGNITION OK ALTERNATOR REGULATOR VOLTAGE OUTPUT INCORRECT WIRING OR IGNITION OK REPLACE REGULATOR (Para 12-21) or (Para 12-22) ALTERNATOR REGULATOR