Auto Electric Repairs Explained


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Auto Electric Repairs Explained

By Mandy Concepcion, copyright 2011, 2017

This book on PDF, Auto-Electric Repairs Explained of which there's also a companion DVD by the same title sold separately, is a dedicated work centered in automotive electric diagnostics and repairs. 80% of the auto-repair duties for an auto technician will be of the electric nature, not necessarily electronics. Electronic is also a part of auto repairs, but covered on another course-manual-DVD by the same author. This book concentrates on the techniques relevant to repairing open and short circuits on actuators, such as motors, power feed, grounds, and other electrical faults.

Techniques such as current ramping, voltage drop, scope usage, sound tracing, current draw test and many others are covered. This book and our other electronics courses 1 & 2 are a must have for any tech or DIY interested in delving into the world of electric and electronic auto repair.

Special thanks given to all the techs and shops who supported my investigations on this technology, and to my wife for her support…God bless.

Table of Contents

The OBD-II DLC or Data-Link-Connector

Electric and Electronic Diagnostics

Electron Flow Theory

How to Do a Voltage Drop Test

How to do a Current/Amperage Test

Stressing the circuit

How to do a Resistance Test

Doing a Continuity Test

Finding Battery Parasitic Current Draw

Electric Ground & Chassis Ground Testing

Sensor Ground Electric Testing

Using the Fox & Hound (tone generator) to find open circuits

Current Ramping Electric Technique

Current Ramping a Fuel Pump

Current Ramping the Ignition Coil

Current Ramping an Injector

Current Ramping Compression Test

Starter Electric Diagnostic Test

Alternator Wire Electronic Voltage-Drop Test

Battery Power Electric Test

Battery Current Draw Electric Test

Ignition Coil Current Ramping Technique

Automotive Electric Wiring Diagrams

Electric Cooling Fan Wiring Diagram Interpretation

Ignition Switch Electric Test