TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 309 of 890
2-224 Change 2 TM 9-2320-280-20-1 ALTERNATOR DIAGNOSTIC FLOWCHART F4 TEST OPTIONS 1. STE/ICE Test 89, (page 2-750) 2. Multimeter REASON FOR QUESTION Wire 568A and wire 568 carry ignition current to turn on regulator. TEST OPTIONS STE/ICE Test 10 and 90, (pages 2-734 and 2-751). REASON FOR QUESTION This connection applies full current loading to field coil. Alternator current output should be near maximum. F5 NO YES REPLACE WIRE 568 FROM F3, Page 2-222 CONNECT WIRE 568A AND 568. DISCONNECT WIRE 568 FROM ALTERNATOR. TURN ROTARY SWITCH TO “RUN”. MEASURE VOLTAGE AT ALTERNATOR END OF WIRE. IS THERE VOLTAGE AT BATTERY END OF WIRE 568? DISCONNECT ALTERNATOR-TO- REGULATOR CABLE. START ENGINE AND SET IDLE 1200-1500 RPM. USING 15 AMP CAPACITY JUMPER WIRE, MOMENTARILY CONNECT PIN A OF ALTERNATOR CONNECTOR TO ENGINE GROUND. DOES CURRENT RISE DURING CONNECTION TO 90-110 AMPS? NO YES REPLACE ALTERNATOR, (Para. 12-24). THEN GO TO Step 5, Page 2-198 REPLACE REGULATOR, (Para. 12-22). THEN GO TO STEP 5, Page 2-198. KNOWN INFO VOLTAGE OUTPUT INCORRECT REGULATOR HAS ENERGIZING VOLTAGE POSSIBLE PROBLEMS ALTERNATOR REGULATOR WIRE KNOWN INFO VOLTAGE OUTPUT INCORRECT REGULATOR HAS ENERGIZING VOLTAGE POSSIBLE PROBLEMS ALTERNATOR REGULATOR