TM-9-2320-280-20-1
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 1 OF 3
JANUARY 1996
TM-9-2320-280-20-1 - Page 76 of 888
TM 9-2320-280-20-1
1-24. BATTERY SYSTEM OPERATION
The battery system is identical for all vehicles covered in this manual and consists of the following circuits
and components.
CIRCUIT 6A-
Connects the batteries to the starter and to the protective control box through
circuit 74A.
BATTERIES
- Two 6TN batteries are connected to provide 24 volts D.C. for the electrical starting
system.
SLAVE RECEPTACLE
- Links an external power source directly to the slaved vehicle’s batteries to
assist in cranking the engine when the vehicle’s batteries are not sufficiently charged.
SHUNT
- Used when measuring current draw from batteries utilizing STE/ICE-R.
PROTECTIVE CONTROL BOX
- Protects the vehicle electrical system in the event the battery
system polarity is reversed.
ROTARY SWITCH
- When in "START" position actuates starter solenoid through circuit 11A and
74A. When in "RUN" position closes circuit 29A to activate instrument cluster gages through circuit 27.
CIRCUIT 7A-
Connects the battery system to the starter negative terminal and chassis ground.
STARTER SOLENOID
- Actuates starter motor gear to crank vehicle engine.
1-43
Back to Top
