Introduction to Modules and Information Circuits
This Intermediate Automotive Electrical Schematic Diagnostic Course takes over where the Beginner Course left off, Reinforcing and Enhancing your Understanding of Automotive Electrical Schematic Diagnosis.
It is Recommended that you Complete the Beginner Course before moving on to this Intermediate Course. The practice activities from the first course lay the groundwork necessary to allow for a smooth transition to the more complex diagrams in this course.
While Course One explains the Foundation Material necessary to Understand many Basic Electrical circuits, This Course will explore Module and Information Circuits in Detail on several schematics, so you can Apply the Knowledge to ANY Schematic.
From his Experience Teaching Thousands of Students over the years, Automotive Service Excellence (ASE) Master Technician and Instructor Steve Liguori has found that students become more adept if they have a solid understanding of a few schematics and the ability to apply that understanding to any schematic.
By Understanding the Basics of Module and Information Circuits, you will find that Your Ability to Diagnose other Systems on the car including, Starting, Charging, Power Windows, Door Locks, Heating and Air Conditioning and Body Electrical will Improve Significantly.
Who this course is for:
- Do-it-Yourselfers who are Eager to Learn how to Diagnose More than Just Basic Automotive Electrical Circuits
- Automotive Technicians who want to jump start their chances of passing the ASE (A6) Electrical Certification
- Automotive Students looking to Improve their Understanding of Automotive Electrical Schematic Diagrams
- Anyone looking to Eliminate the Wasted Time and Money most people spend guessing which components might be bad
- It is recommended that the Do it Yourself - Automotive Electrical Diagnosis - Beginner Course be completed before taking this Course
- Understand the Basics of Module and Information Circuits and be able Apply that Understanding to other, more complex Automotive Electrical Schematic Diagrams
- Utilize a Diagnostic Process and Techniques to narrow down or isolate the vehicle's electrical problems
Review of the Basic Electrical fundamentals of What Every Circuit Needs
Review of the Series and Parallel Circuit Differences.
Review of the Horn Schematic Explaining the components and Operation.
Test your understanding with this quick quiz on Automotive Electrical Terms.
See if your diagnostic skills are improving with this diagnostic assessment. Download the Schematic and see if you are up to the challenge!
Let's go over the Schematic Quiz from Lesson 7 and see how you did.
Let's look at the similarities and differences of Power side and Ground side switches so we can understand them and later apply what we have learned to Information Circuits.
In this video, I will show you how to highlight Power Load and Ground in three colors on the Power side and Ground side switch circuits from video nine. This will help make the expected voltage readings stand out on the page so you can enhance your understanding.
If the Battery voltage changes when the car is running, how will this affect the voltage reading we expect at different parts of the circuit?
Let's take a look.
The Module Information Circuits are often misunderstood. In this video, I will show you how they are very similar to the Power side and Ground side switch circuits that you already understand.
The Computer or Modules on the car are the decision makers for various systems on the car. This video explains how the Input circuits, Module Circuits and Output Circuits work together.
The trunk release schematic in this lesson demonstrates the use of input, module and output circuits used on cars today.
Challenge time again.... See if you can highlight Power, Load and Ground for this Trunk Release Schematic. Download the schematic from the additional resources for this lesson.
The Trunk Release does not work. Let's do some schematic diagnosis and discuss how we would go about narrowing down the possibilities.
Here is another Fault where the Trunk Release does not work. Put on your detective hat and let's start narrowing down the possible suspects.
Let's use the diagnostic process again and see how we might reduce the number of steps necessary to complete the diagnosis.
The cooling fan system for this lesson includes five power, load and ground circuits and has three relays. Let's see how it works.
Highlighting the cooling fan schematic in the Off position can go a long way to helping you understand how the circuits operate.
This time let's highlight the cooling fan schematic with the fans in Low Speed. If you have not done so already, download the schematic in the additional resources.
One more time except this time let's highlight Power, Load and Ground when the fans are on High Speed. As we do our diagnosis in the upcoming lessons, you will see how important understanding the highlighting can be.
The Low Speed fans do not work, but the high speed fans do work. Let's look at the possible complaints we might hear from a car owner and see how we can diagnose the problem.
This time the Low Speed fan works but the High Speed fans do not work. Detective hat time again. Let's see how we can narrow down the possibilities and find the culprit.
None of the fans work this time. What do you think the complaint will be? How can we quickly narrow down the possibilities?
This video twists the diagnosis around to help you understand the schematic inside out. I call it reverse diagnosis.
This video provides a few tips to help you avoid a misdiagnosis when dealing with computers and modules.

Really well put together straightforward and easy to follow

very good

I love it. Made me more understand clearly.