TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 301 of 1205
TM 9-2320-387-24-l BATTERY CIRCUIT I KNOWN INFO I BATTERY RESISTANCE NO GOOD 1 POSSIBLE PROBLEMS 1 BATTERIES CABLES KNOWN INFO BATTERIES OK POSSIBLE PROBLEMS CABLES lB* IS EACH BAlTERY RESISTANCE LESS THAN 25 MILLIOHMS AND EACH BATTERY RESISTANCE CHANGE LESS THAN 50 MILLIOHMS/SECOND ? DIAGNOSTIC FLOWCHART 1 TEST OPTIONS 1. REARRANGE BATTERY BOX TO TEST ONE BATTERY. 2. RUN STEIICE-R TESTS 73.75. (Pages 2-502,2-6&l). REASON FOR QUESTlON If either resistance reading is too high, the batteries are probably weak and may not produce enough power. r 82 1 CHECK THE VOLTAGE DROP ACROSS ALL CABLES IN THE BAll-ERY BOX (SEE NOTE AT RIGHT) AND THE POSITIVE AND NEGATIVE CABLES TO THE STARTER. ARE ALL VOLTAGE DROPS LESS THAN 0.25 VOLT? ITEST I OPTIONS 1. STEIlCE-R TEST 69 (Page 2-506) 2. STEIlCE-R TEST 74 (STARTER CIRCUIT RESISTANCE) OR TEST 69 (NEGATIVE CABLE DROP) OR TEST 66 (STARTER MOTOR. VOLTAGE) (Pages 2-503,2-496, 2-497) 3. MULTIMETER REASON FOR QUESTION Everything else has checked OK. These cables are the only thing in the battery circuit we haven’t tested. 1 I NO FAULTS FOUND. (IF YOU USED TESTS 73 & 75 IN STEP 4, P. 2-240, YOU MAY HAVE A PROBLEM WITH THE DCA. CHECK THE DCA CONNECTIONS AND TRY RUNNING STEP 4 USING TESTS 77 & 79.) SEE NOTE TO RIGHT. 2-244