1. Vehicle Electrical-Electronics Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas
Auto – Truck – H.D. Ground Circuit Electron Current “The Hidden Story of Electrons”
By Vince Fischelli
Veejer Enterprises Inc., Garland, Texas Phone:
Web Site:
Copyright © 2017 Veejer Enterprises, Garland, TX

2. Ground Circuit Electron Current – Main Points
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Ground Circuit Electron Current – Main Points
Current flow in a circuit is the movement of electrons through the circuit.
Electron flow occurs when a voltage source (battery or generator) pushes electrons through a circuit.
Electrons flow from the negative (-) terminal, through the circuit, to the positive (+) terminal of the same voltage source.
The circuit must supply a complete circuit (switch CLOSES) between the (-) and (+) terminals of the same voltage source.
Electrons can only return to the positive terminal of the voltage source they left.
Electrons passing through a circuit load causes the load to function.
Copyright © 2017 Veejer Enterprises Inc., Garland, TX

3. Fig. 1 - Dual Battery Ground System
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 1 - Dual Battery Ground System
Two ground cables Engine Ground and Accessory Ground
Fig. 1
Copyright © 2017 Veejer Enterprises, Garland, TX

4. Fig. 2 - Battery Electron Current Trace battery electron current.
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 2 - Battery Electron Current
Trace battery electron current.
Fig. 2
Copyright © 2017 Veejer Enterprises, Garland, TX

5. Fig. 3 - Path of Generator Electron Current
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 3 - Path of Generator Electron Current
Trace generator electron current.
Fig. 3
Copyright © 2017 Veejer Enterprises, Garland, TX

6. Fig. 4 - Single Battery Ground
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 4 - Single Battery Ground
Notice ground strap replaces Accessory Ground.
Fig. 4
Copyright © 2017 Veejer Enterprises, Garland, TX

7. Fig. 5 - Single Ground on Battery Power
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 5 - Single Ground on Battery Power
Trace battery electron current through Accessory Ground.
Fig. 5
Copyright © 2017 Veejer Enterprises, Garland, TX

8. Fig. 6 - Generator Current – Single Batt. Ground
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 6 - Generator Current – Single Batt. Ground
Trace generator’s two electron current paths.
Fig. 6
Copyright © 2017 Veejer Enterprises, Garland, TX

9. Current Clamp Operation
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Current Clamp Operation
Current Clamp creates 1.0 mV for each Amp passing through the jaws.
The DMM set to volts indicates the mVolts the Current Clamp senses.
Fig from “Vehicle Electrical Troubleshooting SHORTCUTS”
Copyright © 2017 Veejer Enterprises, Garland, TX

10. Fig. 7 - Measure Single Battery Ground Electron Current
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 7 - Measure Single Battery Ground Electron Current
Battery total electron current measured by CC#1.
Fig. 7
Copyright © 2017 Veejer Enterprises, Garland, TX

11. Fig. 8 - Measure Single Battery Ground Electron Current
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 8 - Measure Single Battery Ground Electron Current
CC#2 measures battery recharge current during engine RUN.
Fig. 8
Copyright © 2017 Veejer Enterprises, Garland, TX

12. Fig. 8A - Measure Generator Electron Current
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 8A - Measure Generator Electron Current
Can CC#6 indicate battery recharge electron current?
Fig. 8A
Copyright © 2017 Veejer Enterprises, Garland, TX

13. Understand Current Clamps Always measure one wire at a time.
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Understand Current Clamps
When measuring two wires at the same time the Current Clamp will algebraically add the two currents together.
+5 (+) +15 = 20 and DMM indicates the sum is 20 A.
-5 (+) +15 = 10 and DMM indicates the sum is 10 A.
Always measure one wire at a time.
Fig Illustration taken from “Vehicle Electrical Troubleshooting SHORTCUTS”
Copyright © 2017 Veejer Enterprises, Garland, TX

14. CC#1 indicates total battery electron current.
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig. 9 - Measure Dual Battery Ground Current +A[engine gnd.] (+) +A[acc. cable] = Total battery discharge current.
CC#1 indicates total battery electron current.
Fig. 9
Copyright © 2017 Veejer Enterprises, Garland, TX

15. Fig. 10 - Measure Dual Battery Ground Current
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig Measure Dual Battery Ground Current
CC# 5 indicates recharge current – CC#4 indicates Accessory current.
Fig. 10
Copyright © 2017 Veejer Enterprises, Garland, TX

16. Fig. 11 - Measure Dual Battery Voltage Side Current
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig Measure Dual Battery Voltage Side Current
What is CC#7 unable to indicate?
Fig. 11
Copyright © 2017 Veejer Enterprises, Garland, TX

17. Fig. 12 - Measure Dual Generator Output
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Fig Measure Dual Generator Output
CC#7 and CC#8 indicate generator’s electron current contribution.
Fig. 12
Copyright © 2017 Veejer Enterprises, Garland, TX

18. Electrical – Electronics Troubleshooting Training
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Auto-Truck - H.D.
Electrical – Electronics Troubleshooting Training
Programs
Copyright © 2017 Veejer Enterprises, Garland, TX

19. The 1st Step- "Vehicle Electrical Troubleshooting SHORTCUTS"
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
The 1st Step- "Vehicle Electrical Troubleshooting SHORTCUTS"
The Vehicle Electrical Text Book:  Presents in 7 sections (250 pages) crucial electrical training for automotive and truck service technicians and students with hands-on shop exercises included. Do it all with just a DMM and Current Clamp!
Section 1 Essential electrical principles
Section 2 covers DMM's and Current Clamps
Section 3 How circuits work and electrical laws of circuits
Section 4 How batteries work and how to test a vehicle battery
Section 5 The cranking circuit and how to troubleshoot any cranking problem.
Section 6 How generators work methods to test and troubleshoot charging systems.
Section 7 Reading schematic diagrams
Review test after each section (answers in back of the book)
Visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

20. Veejer Enterprises Inc., Garland, Texas, USA
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
The 2nd Step - FIRST THINGS FIRST Two versions available (single battery and dual battery 14V systems)
Electrical flip-chart that shows a technician or student how to test and troubleshoot a vehicle’s primary electrical system consisting of the battery, major grounds and charging system in 14 test steps.
Do this FIRST: on any vehicle with
An electrical problem
An on-board computer problem
A driveability problem
Spiral bound with laminated pages.
Visit our web page & get all the facts!
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

21. How to Teach or Learn Auto/Truck Electrical Troubleshooting
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
How to Teach or Learn Auto/Truck Electrical Troubleshooting
Students or Technicians must learn how to troubleshoot electrical circuits. The vehicle industry desperately needs electrical troubleshooters!
Students or Technicians don’t really learn how by watching a video or somebody else doing it, although it does help to watch.
Students and Technicians best learn how to troubleshoot electrical circuits with hands-on application following a proven curriculum that allows them numerous hands-on opportunities to simply do it. Practice! – Practice! – Practice!
Here’s the Electrical Troubleshooting Curriculum
Visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

22. Electrical Troubleshooting Trainer
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
1st Hands-On Trainer - H-111A “The Starter Kit”
Electrical Troubleshooting Trainer
The First Step in learning how to troubleshoot an electrical circuit. Demonstrates with hands-on application how circuits work, how circuits fail and how to troubleshoot an electrical circuit to find the problem.
Contains 32 electrical problems for hands-on practice finding electrical problems in a circuit using a DMM.
Power Board H-PCB01 (top)
Lamp Board H-PCB02 (bottom)
Power Supply H-PS01 (supplied with kit)
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

23. Electrical Troubleshooting Trainer
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
H-111A “The Starter Kit”
Electrical Troubleshooting Trainer
Workbook H-WB111A guides students through exercises with hands-on practice covering circuit operation and circuit testing methods with a DMM.
Exercises include measuring circuit voltage, voltage drops and tracing voltage through the circuit. Electrical problems are inserted on the bottom of the circuit boards following guide-lines in an Instructor Guide. Troubleshooting is performed on the top of the circuit boards.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

24. 2nd Hands-On Trainer - H-113 “Troubleshooting DC Motor Circuits”
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
2nd Hands-On Trainer - H-113 “Troubleshooting DC Motor Circuits”
DC Motor Electrical Trainer H-PCB03 demonstrates how DC Motor circuits work, how they fail and how to troubleshoot DC Motor circuits. Covers the new technology of Brushless DC Motors used as cooling fans, blower fans and fuel pumps. Also covers wire wound DC Motors used as blower fans and starter motors.
Provides 37 electrical problems to allow hands-on practice finding all the ways electrical problems occur in DC Motor circuits using a DMM and Current Clamp.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

25. H-PCB03 Connected to the Power Board = H-113
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
H-PCB03 Connected to the Power Board = H-113
The DC Motor Board is connected to the Power Board for live testing and troubleshooting.
Workbook H-WB113 guides student through a series of hands-on exercises to measure circuit voltages and voltage drops to identify electrical problems at any place in a DC Motor circuit.
Electrical problems duplicate common DC Motor circuit failures that allow hands-on practice finding electrical problems using a DMM.
Power Board H-PCB01 (top)
DC Motor Board H-PCB03 (bottom)
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

26. 3rd Hands-On Trainer H-115 “Troubleshooting Relay Circuits”
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
3rd Hands-On Trainer H-115 “Troubleshooting Relay Circuits”
Relay Circuit Electrical Trainer H-PCB05 demonstrates how relay circuits work, how they fail and how to troubleshoot relay circuits.
Troubleshooting relays involves two circuits that have to be tested in the proper sequence which is explained. This program also covers the electronics of spike suppression diodes and testing the spike suppression diode with a DMM.
To add realism to the 75 relay circuit trouble-shooting problems the relay is called the Fuel Pump Relay and the lamp represents the Fuel Pump. The customer complaint for each problem revolves around a fuel pump circuit problem to connect students to the real world.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

27. H-PCB05 Connected to Power Board = H-115
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
H-PCB05 Connected to Power Board = H-115
Relay Circuit Trainer H-PCB05 connects to the Power Board to complete the relay circuit for live relay circuit testing and troubleshooting.
Workbook H-WB115 with over 100 pages guides the student through relay operation, testing relay circuits and explaining the types of problems that occur in relay circuits. Provides 75 electrical problems to allow hands-on practice finding problems in relay circuits using a DMM.
Power Board H-PCB01 (top)
Relay Board H-PCB05 (bottom) connected to the Power Board.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

28. 4th Hands-On Trainer H-PCB06 “Wire Harness Troubleshooting”
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
4th Hands-On Trainer H-PCB06 “Wire Harness Troubleshooting”
Power Board Here
Lamp Board Here
Relay Board Here
DC Motor Board Here
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

29. Creating the “Mini-Electrical System” = H-116
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
Creating the “Mini-Electrical System” = H-116
Wire Harness Electrical Trainer H-PCB06 creates a mini-electrical system to demonstrate how the wire harness connects all circuits together into an electrical system. Illustrates with hands-on how electrical problems affect individual circuits.
Provides 115 electrical problems to allow hands-on practice finding electrical problems related to a wire harness failure such as a broken wire or corroded connection.
“Mini-Electrical-System” (M.E.S.) Power Board H-PCB01 (top)
Lamp Board H-PCB02 (left)
Relay Board H-PCB05 (center)
DC Motor Board H-PCB03 (right) connected to the Power Board.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

30. 5th Hands-On Trainer H-PCB06 “Wire Harness Troubleshooting”
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
5th Hands-On Trainer H-PCB06 “Wire Harness Troubleshooting”
There are two major areas technicians often overlook when attempting to repair CAN Bus system problems.
Problems in the network wiring that could exist when there is 60 ohms at DLC Pins 6 and 14.
Verify Nodes have good B+ voltage on all B+ pins and a good ground circuit on all B- pins.
These must be considered to repair many CAN Bus failures.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

31. Fifth Hands-On Trainer CAN Bus Troubleshooting = H-200
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
Fifth Hands-On Trainer CAN Bus Troubleshooting = H-200
The CAN Bus Trainer is connected to the Power Board. A workbook, H-WB200, guides the student through troubleshooting the CAN Bus network to identify wiring problems even when Pins 6 and 14 indicate 60 ohms.
Troubleshooting training provides ample opportunity for students to understand CAN Bus issues and practice troubleshooting.
20 problems with broken wires and corroded connections in the 60 ohm network.
24 problems when a node has low B+ or high B- connections preventing normal operation.
CAN Bus trouble codes used to describe each problem.
Call or visit our web site for more info!
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

32. Visit our web site for more information or to place an order.
Auto-Truck Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises Inc., Garland, Texas, USA
Visit our web site for more information or to place an order.
Call (972)
Home Page:
60 Lesson Electronics Course on-line:
Hands-On Circuit Board Trainers:
Book
“Vehicle Electrical Troubleshooting SHORTCUTS”
Electrical Flip-Chart FIRST THINGS FIRST
Copyright © 2017 Veejer Enterprises Inc, Garland, TX

33. Veejer Enterprises, Garland, Texas
Vehicle Electrical-Electronics Hands-On Troubleshooting Training Program
Veejer Enterprises, Garland, Texas
Copyright © 2017 Veejer Enterprises, Garland, TX