Table of Contents 652 Body Electrical Diagnosis Objectives Course Map ........................................................................................... a Final Student Performances .................................................................. c Body Electrical Course Menu .......................................................................................... 3 Diagnosis Section 1: Topics ..................................................................................................... 5 Automotive Electrical Circuits .................................................................
7 Electrical Circuit Theory Load .................................................................................................... 8 Voltage Sources ................................................................................. 9 Other Voltage Sources ..................................................................... 10 Over-current Protection Devices ...................................................... 11 Blade Fuses .................................................................................. 12 Control Devices ................................................................................
13 Conductors ....................................................................................... 14 Connectors ....................................................................................... 15 Circuit Operation ............................................................................... 16 Principles of Electricity .......................................................................... 17 Voltage ............................................................................................. 17 Voltage Measurements .....................................................................
18 Available Voltage .............................................................................. 18 Open Circuit Voltage ........................................................................ 19 Voltage Drop ..................................................................................... 20 Measuring Voltage Drop ............................................................... 21 Understanding Voltage Drops ...................................................... 21 Current .............................................................................................. 26 Measuring Amperage ...................................................................
27 Power ........................................................................................... 28 Resistance ........................................................................................ 29 Measuring Resistance ...................................................................... 30 Basic Circuit Principles ......................................................................... 31 Series Resistance ............................................................................. 31 Parallel Resistance ........................................................................... 32 Series-Parallel Resistance ...............................................................
33 Why Does it Matter? ..................................................................... 33 Ohm’s Law ............................................................................................ 34 Applying Ohm’s Law ......................................................................... 35 General Electrical Rules ................................................................... 36 Series Circuit Principles ........................................................................ 37 Voltage ............................................................................................. 37 Resistance and Current ....................................................................
38 Series Circuit General Rules ............................................................ 38 Current Flow in Series Circuits ......................................................... 39 Parallel Circuit Principles ...................................................................... 43 Voltage ............................................................................................. 44 Backprobing a Connector ............................................................. 45 Technical Training i