TM 9-2320-272-10
1-19.
ELECTRICAL SYSTEMS OPERATION (Contd)
b.
Starting System Operation.
The starting system is identical for all models covered in this manual and consists of the following major
components and circuitry:
H
BATTERY SWITCH - Completes circuit 459, closing a relay in the protective control box to supply power to
the ignition switch through circuits 5 and 5B.
I
PROTECTIVE CONTROL BOX - Locks out starter circuit, which prevents starter from reengaging while
engine is running.
J
IGNITION SWITCH - Provides battery power to the fuel solenoid through circuit 54 and the neutral start
safety switch through circuit 498.
K
NEUTRAL START SAFETY SWITCH - Prevents starter from energizing when vehicle is not in neutral, by
deenergizing circuit 499 and a relay in the protective control box, which disconnects power from circuit 74
and the starter solenoid.
L
STARTER SOLENOID - A magnetic relay that is powered by circuit 74 to transmit 24-volt battery power to the
starter motor through circuit 6.
M
STARTER MOTOR - Cranks the engine for starting. Supplied with 24-volt battery power through circuit 6.
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