Technician's Version NEW! Vehicle "How To" Test Guide. NEW! 25 years of
vehicle testing techniques on one CD. 107 Slides in Power
Point Show format. Over 50 descriptive
photos of "hands on how to" tests with expected results. 27 slides on meter set up
and probe placement techniques for testing voltage and voltage drop. General rules for
allowable voltage drops in vehicle circuits - 5 page word doc. Written by Auto Instructor: Joe Glassford,
author of: AVI Video LBT 101 “Voltage Drop Testing”.
Copyright § All Rights Reserved
This
technician's version covers the following:
Meters
How
Accurate is Your Test Meter?
Understanding What a Voltmeter is Reading.
How
to: Set a Digital Volt Ohm Meter for
Set the Digital Volt Ohm Meter, Leads, and
Probes for
the
battery positive (+) terminal and the input pin to any load on the vehicle.
Set the Digital Volt Ohm Meter, Leads, and
Probes for
the
battery negative (-) terminal and the output pin or case ground from any load
on the vehicle.
Set the Digital Volt Ohm Meter, Leads, and
Probes for
to
any load on the vehicle.
Calibrate an Inductive Pick Up That Plugs into
a Voltmeter.
Read a 100 millivolts per amp Inductive Pick
up.
Make and Use a 10X Inductive Multiplier.
Extend Meter Leads When Testing a Long
Distance From the
How
to: Test the Voltage Drop Between the
Test the Voltage Drop Between The
Test the Open Circuit Voltage of the
Charge the
Do a
Do a
Find the Parasitic Drain on any
Do a 3 - Minute Charge Test on a
Test the Voltage Drop Between: the
Test the Voltage Drop Between: The
Test The Voltage Drop of a
Test Connectors and Connections of Positive + Pigtail
Wires.
Test the voltage drop between: the wire and
the clamp material in a battery positive (+) pigtail.
Test the Voltage Drop Between: the
Attaches
to the Frame or the Block.
Test the Voltage Drop Between: the
Test the Voltage Drop Across a Suspect
Negative Pigtail Cable or Wire Connector.
Computer/Module
Testing
How
to: Test the Voltage Drop of Computer Voltage Feed Wires That Can Be
Back-probed.
Test the Voltage Drop of Computer Ground Wires
That Can Be Back-probed.
Load Test Computer Voltage Feed Wires.
Load Test Computer Ground Wires.
Continuity
Testing and Ohmmeter Usage
How
to: Test for Continuity with an Ohmmeter.
Cautions
When Using an Ohmmeter.
How
To: Tell if
Current
Path, Connections, and Switch Contact Testing
How
to: Test the Voltage Drop of Any Length of Wire
Test for Available Voltage to a
“Hot at All Times” Connection.
Test for Available Voltage to a
“Hot In Start or Run” Connection.
Load Test a “Hot at all
Times" Connection.
Load Test a “Hot in Start or
Run” Connection.
Test Any Mechanical Switch Using
an Ohmmeter.
Tests the Voltage Drop of Any
Mechanical Switch.
Test the Voltage Drop of a
“Suspect Wire Connector”.
Fuse,
Fusible Link, and Circuit Breaker Testing
How
to: Test the Voltage Drop Across a Fuse Connection.
Use a Blown Fuse to Direct Your
Troubleshooting.
Find a Short to Ground (that
resulted in a blown fuse), Using a Light Bulb Load.
Test Fusible Link Wire.
Test a Suspect Circuit Breaker.
Generator
Testing
How
to: Test the Generator Charging Voltage.
Test the Voltage Drop Between:
the Generator Output and the
Test the Voltage Drop Between:
the
Test the Voltage Drop Between:
The Generator Housing and the Block.
Test for Generator "AC
Riding on DC."
Check For Bad Diodes in a Non
Computer Controlled Generator using the “Diode Test Mode” of the Digital Volt Ohm
Meter.
Test for Shorted Diodes in the
Generator Using the “
Verify a Good Generator.
Test the
Relay
Testing
How
to: Deal With a “Suspect Relay”.
Troubleshoot a Relay Controlled
Circuit.
Starter
Testing
How
to: Test the Cranking Voltage Available to the Starter Motor.
Test the Voltage Drop Between:
the
Test the Voltage Drop of a
Starter Mounted or Remote Mounted Solenoid.
Test the Voltage Drop Between:
Test the Voltage Drop Between:
the Starter Housing and the Block.
Do a Starter Motor Amp Draw Test
with a VAT 40 or 45.
Do a Starter Motor Amperage Draw
Test With a Load Tester That Has a Voltmeter & Amp Meter,
but
No Inductive Pick Up.
Do a Starter Motor Amperage Draw
Test With an Inductive Pick Up Plugged Into a Digital
Voltmeter.
Shared
Current Path and Voltage Drop Testing
How
To: Find Open Circuit, Charging, Or Source Voltage.
Find The Amount Of Source Voltage Available
To Any Load.
Find The Voltage Drop Between: The
Find The Voltage Drop Between: The Ground Side
Of Any Load And The
Terminal.
Find The Voltage Drop Between: Truck Bed And
Cab Sheet Metal.
Find The Voltage Drop Between: The
Strap.
Find The Voltage Drop Between: The Bulkhead
And The Block.
Find the Voltage Drop Between: The
Pigtail
Attached To Sheet Or Frame Metal.
Other
Tests and Information
How
to: Stop Electrical Switch Popping “Noise” in a Radio.
How
a Voltage Drop Can Cause Ring Gear Damage.
How
To: Find the Percent of Alcohol in Gasoline.
Check for Water in Brake Fluid
Using a Voltage Drop Test.
Check Acid Content In Coolant
With a Voltage Drop Test.
Test a Rear Window Defogger
Using a Test Light.
Test a Rear Window Defogger
using a Voltmeter.
Test Thermistor Temperature
Sensors.
Wire
Sizes, Diameter, Ohms/1000Ft. and Rated Continuous Amperage.
Observed
wire sizes used on a 2007 C/K GMC.
How DC “Motor Drag” Can Affect Voltage Drop.
How
DC Motor In-Rush Current Can Affect Voltage Drop.
Precautions
to Observe Whenever a Vehicle Component is Unplugged.
When
the Voltage Drop Is Still Excessive after Repair, Then What? ©
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