TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 277 of 890
2-194 Change 1 These Alternator tests can be run any time you think there may be a problem with the alternator or battery charging or if you were sent here from another system chain. These tests are NOT for the batteries. These tests are strictly for the alternator, its operation, and its associated wiring. Tests for the batteries are in Battery Circuit, Paragraph 2-29. A simplified block diagram for the alternator system is given on page 2-195. A detailed functional flow schematic is provided as foldout FO-6 to help you understand the system as you perform the tests. After preliminary common tests, the model of alternator must be identified for specific testing to determine if alternator or regulator is defective. 2-27. ALTERNATOR TESTS TM 9-2320-280-20-1 Table 2-2. Adaption of dual voltage alternator on a single voltage system Dual Voltage Alternator Single Voltage System 100 Amp 200 Amp 400 Amp Ground wire afixed to regulator base and 14 volt power stud Ground wire afixed to regulator base and 14 volt power stud No ground wire afixed to regulator or 14 volt power stud Dual voltage 100, 200, and 400 amp alternators can be installed in a single voltage system. See Table 2-2 for hookup procedures. NOTE