The Relay Circuit Troubleshooting Trainer, H-PCB05
shown at the left, is connected to the Starter Kit's Power
Board and Power Supply (from H-111A). A technician can now
learn all about relay circuits and practice troubleshooting 75 live
relay circuit problems.
Multiple hands-on practice exercises
are embedded in the Student Workbook H-WB115 text (over 110
pages) with extensive instructions covering relay operation,
characteristics of relay circuits, spike suppression diodes/resistors
and relay circuit troubleshooting techniques.
Learn how relays are used in
vehicle circuits but more importantly how relay circuits fail
and the troubleshooting techniques to find any relay circuit
problem when a new relay didn't fix the problem.
This program contains extensive
step-by-step instruction and hands-on exercises. Techs learn to analyze the ways relay
circuits fail, how to measure voltage, voltage drops, resistance
and current in relay circuits and to identify relay circuit problems.
How spike suppression diodes connected across a relay coil work
is thoroughly discussed and what happens when the diode fails.
Then spike suppression diode testing with an analog ohmmeter,
a digital ohmmeter and the Diode Test feature of a DMM is discussed
with hands-on exercises to follow along step-by-step. Learn why
the DMM's Diode Test feature doesn't always work to test spike
All this is followed by hands-on practice in relay circuit troubleshooting
technique as techs practice troubleshooting 75 individual live
relay circuit problems, one at a time, to develop electrical troubleshooting
skill and self-confidence. Each troubleshooting problem addresses
the relay as a fuel pump relay and the lamp simulates fuel pump
operation. A scenario (customer complaint) accompanies each problem relating to a
fuel pressure issue that would result from the problem inserted
into the circuit boards to add realism to the live troubleshooting
exercises. This helps techs to consider an actual problem with
fuel pressure and relating it to a specific relay circuit failure, in this case a fuel pump relay.
The Relay Instructor Guide, H-IG115,
provides answers to all review exercises and complete instructions
for inserting relay circuit problems in Relay Circuit Troubleshooting
Trainer. Answers to each troubleshooting problem are also included
so you can teach yourself.
Techs troubleshoot from the top
side of the PCB using test points provided on the Troubleshooting
Trainers and their own DMM. Students evaluate their troubleshooting
progress by comparing their review exercises and troubleshooting
procedures with the Instructor Guide notes.
To view the Relay Circuit Troubleshooting
here. Notice the advanced schematic used for the relay circuit
using simulated computer control of the relay.
To return to the Shop Owners
web page click
To return to the Teachers web page click
To return to the first page
of the Hands-On Training Program click
To return to Veejer's home
page click here.