TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 297 of 1205
TM 9-2320-387-24-l BAlTERY CIRCUIT KNOWN INFO I CONNECTlONS OK WATER LEVEL OK BATTERY VOLTAGE OK ALTERNATOR CIRCUIT POSSIBLE PROBLEMS BATTERIES CABLES I KNOWN INFO BATTERIES OK ALTERNATOR CIRCUIT OK POSSIBLE PROBLEMS CABLES KNOWN INFO I BATTERIES OK NEGATIVE CABLE OK ALTERNATOR CIRCUIT OK POSSIBLE PROBLEMS CABLES ’ OPTIONS IS BATTERY PAIR RESISTANCE LESS THAN 25 MlLLlOHMS AND BATTERY RESISTANCE CHANGE LESS THAN 50 MILLIOHMS/SECOND? STE/lCE-R TESTS 73,75 (Pages 2-602.2-504) REASON FOR QUESTION If either resistance reading is too high, the batteries are probabty weak and may not produce enough power. 5 ] TEST OPTtONS / IS THE STARTER NEGATIVE 1. STEIICE-R TEST 69 CABLE VOLTAGE DROP LESS (Page 2-496) THAN 0.25 VOLT? 2. MULTIMETER REASON FOR QUESTION A large voltage drop indicates high resistance. High resistance means less current flow. IS THE VOLTAGE DROP FROM THE POWER STUD TO THE STARTER LESS THAN 0.25 VOLT? TEST POINT IS THE POWER STUD; GROUND IS THE STARTER TERMINAL. TEST OPTIONS 1. St-EXE-R TEST 89 (Page 2-606) 2. MULTIMETER REASON FOR QUESTtON A large voltage drop indicates high resistance. High resistance means less current flow.