5-1
CHAPTER 5. ELECTRICAL SYSTEMS
GENERAL INFORMATION
The electrical system consists of three main elements:
a battery, a starting circuit, and a charging circuit. The
battery is part of both the starting and charging circuit.
Battery voltage should be checked before going into any
extensive starter or charging system checks. If a battery
has a shorted cell, overcharging can result, and the
regulator or rectifier may appear to be at fault. If a cell
has an open or high resistance connection, the electric
starter operation will be affected.
The power source used to provide the energy to turn an
electric starter motor on the TVT series is 12 volt D.C.
The 12-volt battery system requires a charging package
to maintain proper battery charge.
The starting circuit includes the battery, battery cables,
ignition switch, safety switches, starter solenoid, and the
electric starter motor.
The charging system consists of alternator charge coils,
a diode or regulator, ignition switch, flywheel magnets,
and a battery. All engines that have a charging system
will use a combination of some or all of these features.
5-1
OPERATION
Although most equipment has an electrical system that
consists of three main elements, (battery, starting circuit,
and charging circuit) they can vary in layout and design
form model to model as well as manufacturer to
manufacturer.
Within each element there are individual components
(battery, wiring, safety switches, ignition switch, solenoid,
etc.) which must be diagnosed separately. The illustration
shown (Illust. 5-1) is a basic diagram which includes some
of the elements used in an electrical system.
REGULATOR
12 VOLT STARTER MOTOR
GREEN
MAGNETO
GROUND
SOLENOID
BATTERY
LIGHT
SWITCH
AMMETER
FUSE
REGULATED
D.C. OUTPUT
SAFETY
SWITCH
FUEL SHUT-OFF
SOLENOID
SAFETY
SWITCH
SAFETY
SWITCH
(+)
(+)
+
B
R
A
M
S
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