%PDF-1.6 %���� Caution: If a fuse has blown, replace it one that has the SAME amp rating as the original. fee. The automotive electrical system contains five electrical circuits: charging, starting, ignition, lighting, and accessory. $24.99 $ 24. Amperes, amps, or current is the measure of the flow of electricity through a given circuit, and vital in diagnosing automotive electrical problems. will not function normally if they are not being supplied with 12 volts of power. Left unchecked, voltage drop causes countless unsolved electrical mysteries, especially when it infects the ground side of a circuit. 3. its journey through the circuit. battery negative cable is attached to the metal body or chassis, while the positive battery cable (+) is connected to the power The voltmeter's leads are connected Measuring voltage drop is an effective means to quickly pinpoint automotive electrical circuit problems such as loose or corroded ]�{tޔ�AgW�/�8�~������%�'4 1(_)����`�� Every vehicle must be equipped with a means of replac-ing the energy that is being drawn from the battery. All passenger car and light truck electrical systems are 12 volts and have been since the mid-1950s. fuse with a higher amp rating as this may allow the circuit to overheat or suffer damage. Even though the electrical system is extremely complex, there are still many repairs that you can do without taking your vehicle to a service facility. Obviously this saves something on wiring. P�W~3J����;��DV�t��N�I���%�Շ��Շe!袡�4I��������`��`�Yɖ{�4����ii�,�x�G.r����EV��-�V�u�8��@$�G'�P��e ,�2��HG���R��0�o�o1☈��J�J7�$�`[q^�K�X`?tH�.��6�~��Lr�'U3�=�o�.,.�H��m`>��^2�L|,��5K_-���>+�E�3��/ő雴�����fQF��~m��1wp��'�'e�bڕF$�"�`���0�"�/E�Z�l)��z)���*���� +^,U� LS@�`>J#��-�43�&ۏ���\!���e����76�j�����wo/4S�n Y�6�uf��+%^��/�d�)ϣL����n��a #h6�?�M �c���vSN�aF�FGT�%��O��=_�X8�[��2o\7�Q�89�o���i�a�YV���E����kѳ� =��Û�9F5�kU���õ-׳{*vO�fc��OI�,熻�{�C���^7��X^ `�c�7�`���!��+�ndo{��=���{�=�. 0000001731 00000 n INTRODUCTION 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.. wire or conductor as this will prove no overload protection at all. A common example of Ohms Law causing an electrical problem in your car or truck would be a loose or corroded battery cable. Ohms Law can be expressed in various ways: Understanding Ohms Law and the relationships between volts,ohms and amps is the key to understanding electrical currents and what 0000002648 00000 n Insulation can become brittle with age and may crack or flake off the wiring, allowing the bare metal underneath to make electrical contact with adjacent wires or the body. of measurement that are used to describe what goes on inside an electrical circuit. Sep 2, 2020 | Automotive One of the most rampant electrical maladies showing up in automotive service bays today is the phenomenon known as voltage drop. Identify the primary types of automotive wiring, types of terminals, and wiring diagrams. Apart from the main charging, starting and ignition circuits, there are other circuits that power lights, electric motors, the sensors and gauges of electrical instruments, heating elements, magnetically operated locks, the radio and so on. trailer Automotive electrical tools are used to test and diagnose and improve electrical circuits in automotive and other 12 or 24 volt electrical systems. About 0% of these are PCBA, 0% are Multilayer PCB, and 0% are Other PCB & PCBA. In this type of circuit, part of the circuit might have loads in series while in another part the loads would be You are here. Automotive Service Excellence (ASE) Master Technician and Instructor Steve Liguori, Teaches Beginners, and Do-it-Yourselfers how to Understand Automotive Electrical Wiring Diagrams and Schematics . 0000000016 00000 n aftermarket source such as AlldataDIY for a small creates multiple branches or pathways through which current can flow. Vibration can also cause high resistance in electrical connectors and wiring. Low system voltage due to a low battery or low charging output can play havoc with a vehicle's electronic control modules. An overload may cause the circuit fuse to blow. electrical connection and circuit problems due to a crop in current within that circuit. As a rule of thumb, a voltage drop MORE than one tenth volt (0.1v) across a low voltage or low amperage connection means trouble. This is instead of being measured in pounds per square inch, voltage is measured in units called Volts.
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