Self-Study Programme 873003 How to read wiring diagrams.pdf

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Volkswagen of America, Inc.
Service Training
Printed in U.S.A.
Printed 8/01
Course Number 873003
©2001 Volkswagen of America, Inc.
All rights reserved. Information contained
in this manual is based on the latest
information available at the time of printing and
is subject to the copyright and other intellectual
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its affiliated companies and its licensors.
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redistribute information should be referred to
Volkswagen of America, Inc.
Always check Technical Bulletins and the
Volkswagen Worldwide Repair Information
System for information that may supersede
any information included in this booklet.
Table of Contents
Page
Course goals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Wiring Diagram Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Elements of a wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DIN 72 552 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Introduction to Conductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wire colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wire sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Other Conductor descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Practical Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Navigation 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Navigation 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Navigation 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Navigation 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix A: Component Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Appendix B: Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Appendix C: Component Codes and Wiring . . . . . . . . . . . . . . . . . . . 35
Appendix D: DIN Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Appendix E: Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Teletest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
i
Course Goals
Course goals
This course will enable you to:
• Follow current from its power
source to the Ground point quickly
and accurately.
• Understand the symbols of
common components and circuit
designations used in Volkswagen
Wiring Diagrams.
• Practice Wiring Diagram navigation
through practical exercises and hands
on examples.
ii
Introduction
Introduction
As today’s vehicles become increasingly
complex, so does the job of the technician.
Wiring diagram navigation skills are critical to
diagnosing and repairing today’s vehicle in a
timely and accurate manner.
This Self Study Program is not intended to
instruct the technician how the electrical sys-
tem operates in a vehicle. Given an under-
standing of electrical operation, this Self
Study Program will introduce you to the skills
necessary to read Volkswagen wiring dia-
grams.
In this program you will be exposed to all
aspects of wiring diagrams, including:
• Commonly used symbols and their
meanings
• Current tracks, including how to
follow circuits between pages
or diagrams
• Component identification
• DIN standards for terminal designations
• Wiring color codes and gauge (size)
• Terminal identification on both
connectors and components
This book will provide examples of various
types of circuits. The Computer Based
Training (CBT) CD included at the end of this
self study will provide an opportunity to prac-
tice “hands-on” wiring diagram navigation.
Areas of text that give the technician an
opportunity to practice the concepts in the
CBT will be designated with an icon of a CD
(below) at the beginning of that section.
1

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