ELECTRICAL SYSTEM

TM 9-2320-391-10

M1078A1 SERIES THEORY OF OPERATION -

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Continued

ELECTRICAL SYSTEM

Alternator, Battery, and Starting Systems (Vehicle S/N 11,438 to 18,549). The

vehicle Electrical System is a combined 12/24 VDC system. Four 12-volt batteries are

connected in series-parallel with the negative terminal grounded to the vehicle chassis.

1. Positioning the master power switch to on applies power to all electrical circuits

needed to operate the vehicle.

2. The starting motor operates directly from the 24 VDC source through the starter

pushbutton.

3. A 12/24-volt, belt-driven alternator with a 100 amp capacity maintains the charge on

the batteries. The 24 VDC source supplies electrical power to operate the starting

motor, Central Tire Inflation System (CTIS), fuel/water separator, air dryer, ether

injection system, instrument panel assembly gages, and windshield wipers/washer.

The 12 VDC source supplies electrical power to the vehicle lights and instrument panel

assembly lights.

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