TM 5-2410-241-23-1
0008
ELECTRICAL SYSTEM CONTINUED
The engine has a wire ground to the battery.
Ground wires or ground straps are combined at ground studs that are only for ground use. All of the grounds
should be tight and free of corrosion.
All of the ground paths must be capable of carrying any likely current faults. An AWG #0 or larger wire is used for
the grounding cable to the starter and engine block and grounding strap from the starter to the frame.
The engine alternator is grounded to the engine block with a ground strap that is capable of managing the full
charging current of the alternator.
The engine ECM and powertrain ECM have several input components that require an operating voltage range.
Unlike many electronic systems of the past, the electrical system is shielded from common external sources of
electrical noise and interference.
Engine Electrical System
0008
The electrical system has the following separate circuits:
a. Charging
b. Starting
c. Accessories with low amperage
Some of the electrical system components are used in more than one circuit. The following components are
common in more than one circuit:
Batteries
Battery cables
The charging circuit is in operation when the engine is running. An alternator makes electricity for the charging
circuit. An internal voltage regulator controls the electrical output in order to keep the battery at full charge.
The starting circuit is activated through the engine ECM when the start switch is activated.
Charging System Components
0008
Refer to Table 1.
0008
Alternator
0008
The alternator is driven by a belt from the crankshaft pulley, and is a three-phase, self-rectifying charging unit. The
regulator is part of the alternator.
The alternator design has no need for slip rings and the only moving part is the rotor assembly. All conductors that
carry current are stationary. The following conductors are in the circuit:
Field winding
Stator windings
Six rectifying diodes
Regulator circuit components
0008-2