TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 302 of 1205
REFERENCE INFORMATION -I Replace batteries (para. 4-74). NOTE Checkthese cables: WIRE 66, connecting the batteries together. Test point is the positive terminal of one of the batteries. WIRE 49A, connecting the battery to the power stud. Test point is the power stud. Wire connecting the battery to the shunt. Test point is the negative terminal of the battery. Wire connecting shunt to ground stud. Test point is the shunt. Replace batteries (para. 4-74). I NOTE Tests T7 and 79 are TK tests that do the -I same thing that DCA tests 73 and 76 do. See TM 9-491M71-12&P for instructions on how to run these tests. TM 9-2320-387-24-l BATTERY CIRCUIT BAlTERY INTERNAL RESISTANCE STUICE-R TEST 73 1. Disconnect wire 54A at injection pump to prevent starting. 2. Disconnect glow plug controller and fan solenoid (to keep waveform clean). 3. Start Test 73. Battery Internal Resistance. 4. Wait for the GO message. Crank the engine. 5. Result is displayed in milliohms. Battery resistance should be 25 milliohms max. BAlTERY RESISTANCE CHANGE STUICE-R TEST 75 I 1. Disconnect wire 54A at injection pump to prevent stating. 2. Disconnect glow plug controller and fan solenoid (to keep waveform clean). 3. Start Test 75. Battery Resistance Change. 4. Wait for the GO message. Crank the engine. 5. Result is displayed in milliohms/second. Battery resistance change should be 50 milliohms/second max. DC VOLTAGE O-45 VOLTS STEllCE-R TEST 89 I 1. Connect RED clip to the indicated test point, BLACK clip lo negative or ground. I 2. Start Test 69. DC Volts. 3. Displayed reading is in volts. 2-245/(2-246 blank)