TM-9-2320-387-10 HMMWV Operator Manual Download
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TM 9-2320-387-10 rl-20. BATTERY SYSTEM OPERATION 1 0 A 0 B 0 C 0 D 0 E 0 F 0 G 0 H 0 I 1-22 The battery system consists of the following circuits and components: CIRCUIT 6A- Connects batteries (through buss bar) to starter and protective control box through circuit 74k BATTERY POSITIVE CABLE - Connects battery positive to buss bar. BA’ITERIES - Two 6TN batteries are connected in a series to provide 24 volts DC for the electrical starting system and to assist alternator during operation. SLAVE RECEPTACLE - Links an external power source directly to slaved vehicle’s batteries to assist in cranking engine when vehicle’s batteries are not sufficiently charged. SHUNT - Used when measuring current draw from batteries utilizing STEZICE-R. PROTECTIVE CONTROL BOX - Protects vehicle electrical system in the event battery polarity is reversed. Provides frequency lockout, load dump, glow plug operation, and interfacing of engine and body harnesses. ROTARY SWITCH - When in START position, actuates starter solenoid through circuits 1lA and 74A When in RUN position, closes circuit 29A to activate instrument cluster gauges through circuit 27. CIRCUIT 7A - Connects starter negative circuit terminal to engine ground while 7E connects shunt to engine ground. STARTER SOLENOID -Actuates starter motor gear to crank vehicle engine.