AUTOMOTIVE ELECTRICAL CIRCUITS AND WIRING

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AUTOMOTIVE ELECTRICAL CIRCUITS AND WIRING
Learning Objective:
Identify charging, starting, ignition, and accessory-circuit components, their functions, and maintenance procedures. Identify the basic types of automotive wiring, types of terminals, and wiring diagrams. The electrical systems on equipment used by the Navy are designed to perform a variety of functions. The automotive electrical system contains five electrical circuits. These circuits are as follows:
Charging circuit.
Starting circuit.
Ignition circuit.
Lighting circuit.
Accessory circuit.
Electrical power and control signals must be delivered to electrical devices reliably and safely so electrical system functions are not impaired or converted to hazards. This goal is accomplished through careful circuit design, prudent component selection, and practical equipment location.

CHARGING CIRCUIT Learning Objective:
Understanding how these circuits work and the adjustments and repairs required to maintain the electrical systems in peak condition.
Identify charging-circuit components, their functions, and maintenance procedures. The charging system performs several functions, which are as follows: It recharges the battery after engine cranking or after the use of electrical accessories with the engine turned off. It supplies all the electricity for the vehicle when the engine is running. It must change output to meet different electrical loads. It provides a voltage output that is slightly higher than battery voltage. A typical charging circuit consists of the following: BATTERY—provides current to energize or excite the alternator and assists in stabilizing initial alternator output.
ALTERNATOR or GENERATOR—uses mechanical (engine) power to produce electricity. ALTERNATOR BELT—links the engine crankshaft pulley with alternator/generator pulley to drive the alternator/generator.
V O L T A G E R E G U L A T O R — a m m e t e r, voltmeter, or warning light to inform the operator of charging system condition.


The storage battery is the heart of the charging circuit. It is an electrochemical device for producing and storing electricity. A vehicle battery has several important functions, which are as follows: It must operate the starting motor, ignition system, electronic fuel injection system, and other electrical devices for the engine during engine cranking and starting. It must supply ALL of the electrical power for the vehicle when the engine is not running. It must help the charging system provide electricity when current demands are above the output limit of the charging system.
Info from this website.
http://www.tpub.com/content/constructio ... 273_31.htm