
ABOUT THIS MANUAL
GENERAL
This electrical diagnostic service manual has been prepared
with two purposes in mind. First, it will acquaint the user with
the construction of the Harley-Davidson product and assist in
the performance of repair. Secondly, it will introduce to the
professional Harley-Davidson Technician the latest field-tested
and factory-approved diagnostic methods.We sincerely believe
that this manual will make your association with Harley-Dav-
idson products more pleasant and profitable.
HOW TO USE YOUR SERVICE MANUAL
Refer to the table below for the content layout of this manual.
CHAPTER NO.
General Information 1
Initial Diagnostics and Serial Data 2
Starting and Charging 3
Instruments 4
Accessories, Horn, Lighting and Security 5
Engine Management 6
ABS 7
Appendix A Connector Repair A
Appendix B Wiring B
Appendix C Conversions C
Appendix D Glossary D
Use the TABLE OF CONTENTS (which follows this FORE-
WORD) and the INDEX (at the back of this manual) to quickly
locate subjects. Chapters and topics in this manual are
sequentially numbered for easy navigation.
For example, a cross-reference shown as 2.2
SPECIFICATIONS refers to chapter 2 CHASSIS, heading 2.2
SPECIFICATIONS.
For quick and easy reference, all pages contain a chapter
number followed by a page number. For example, page 3-5
refers to page 5 in Chapter 3.
A number of acronyms and abbreviations are used in this
document. See the D .1 GLOSSAR Y for a list of acronyms,
abbreviations and definitions.
PREPARATION FOR SERVICE
TOOL NAME PART NUMBER
DIGITAL TECHNICIAN II HD-48650
Stop the engine when refueling or servicing the fuel
system. Do not smoke or allow open flame or sparks near
gasoline. Gasoline is extremely flammable and highly
explosive, which could result in death or serious injury.
(00002a)
Good preparation is very important for efficient service work.
Start each job with a clean work area. This will allow the repair
to proceed as smoothly as possible. It will also reduce the
incidence of misplaced tools and parts.
Clean a motorcycle that is excessively dirty before work starts.
Cleaning will occasionally uncover sources of trouble. Gather
any tools, instruments and any parts needed for the job before
work begins. Interrupting a job to locate tools or parts is a dis-
traction and causes needless delay.
NOTES
• To avoid unnecessary disassembly, carefully read all
related service information before repair work begins.
• In figure legends, the number which follows the name of
a part indicates the quantity necessary for one complete
assembly.
• When servicing a vehicle equipped with the Harley-Dav-
idson Smart Security System (H-DSSS), first disarm the
system. Keep the fob close to the vehicle or use DIGITAL
TECHNICIAN II (Part No. HD-48650) to disable the
system. Activate the system after service is completed.
SERVICE BULLETINS
In addition to the information presented in this manual, Harley-
Davidson Motor Company will periodically issue service bul-
letins to Harley-Davidson dealers. Service bulletins cover
interim engineering changes and supplementary information.
Consult the service bulletins to keep your product knowledge
current and complete.
USE GENUINE REPLACEMENT PARTS
Harley-Davidson parts and accessories are designed for
Harley-Davidson motorcycles. Using non-Harley-Davidson
parts or accessories can adversely affect performance,
stability or handling, which could result in death or serious
injury. (00001b)
To achieve satisfactory and lasting repairs, carefully follow the
service manual instructions and use only genuine Harley-
Davidson replacement parts. Behind the emblem bearing the
words GENUINE HARLEY-DAVIDSON stand more than 100
years of design, research, manufacturing, testing and inspecting
experience.This is your assurance that the parts you are using
will fit right, operate properly and last longer.
WARNINGS AND CAUTIONS
Statements in this manual preceded by the following words
are of special significance.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury. (00119a)
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. (00139a)
NOTICE indicates a potentially hazardous situation which,
if not avoided, may result in property damage. (00140b)
I
FOREWORD

NOTE
Refers to important information, and is placed in italic type. It
is recommended that you take special notice of these items.
Proper service and repair is important for the safe, reliable
operation of all mechanical products. The service procedures
recommended and described in this manual are effective
methods for performing service operations.
Always wear proper eye protection when using hammers,
arbor or hydraulic presses, gear pullers, spring com-
pressors, slide hammers and similar tools. Flying parts
could result in death or serious injury. (00496b)
Some of these service operations require the use of tools
specially designed for the purpose. These special tools should
be used when and as recommended. It is important to note
that some warnings against the use of specific service methods,
which could damage the motorcycle or render it unsafe, are
stated in this manual. However, remember that these warnings
are not all-inclusive. Inadequate safety precautions could result
in death or serious injury.
Since Harley-Davidson could not possibly know, evaluate or
advise the service trade of all possible ways in which service
might be performed, or of the possible hazardous con-
sequences of each method, we have not undertaken any such
broad evaluation. Accordingly, anyone who uses a service
procedure or tool which is not recommended by Harley-Dav-
idson must first thoroughly satisfy himself that neither his nor
the operator's safety will be jeopardized as a result. Failure to
do so could result in death or serious injury.
PRODUCT REFERENCES
Read and follow warnings and directions on all products.
Failure to follow warnings and directions can result in
death or serious injury. (00470b)
When reference is made in this manual to a specific brand
name product, tool or instrument, an equivalent product, tool
or instrument may be substituted.
Kent-Moore Products
All tools mentioned in this manual with an "HD", "J" or "B"
preface must be ordered through SPX Kent-Moore. For ordering
information or product returns, warranty or otherwise, visit
www.spx.com.
LOCTITE Sealing and THREADLOCKING
Products
Some procedures in this manual call for the use of LOCTITE
products. If you have any questions regarding LOCTITE product
usage or retailer/wholesaler locations, contact Loctite Corp. at
www.loctite.com.
PRODUCT REGISTERED MARKS
Apple, Alcantara S.p.A., Allen, Amp Multilock, Bluetooth,
Brembo, Delphi, Deutsch, Dunlop, Dynojet, Fluke, G.E.
Versilube, Garmin, Gunk, Hydroseal, Hylomar, iPhone, iPod,
Kevlar, Lexan, Loctite, Lubriplate, Keps, K&N, Magnaflux,
Marson Thread-Setter Tool Kit, MAXI fuse, Molex, Michelin,
MPZ, Mulitilock, nano, NGK, Novus, Packard, Pirelli, Permatex,
Philips, PJ1, Pozidriv, Robinair, S100, Sems, Snap-on, Teflon,
Threadlocker, Torca, Torco, TORX, Tufoil, Tyco, Ultratorch,
Velcro, X-Acto, XM Satellite Radio, and zumo are among the
trademarks of their respective owners.
H-D MICHIGAN, INC. TRADEMARK
INFORMATION
Bar & Shield, Cross Bones, Digital Tech, Digital Technician,
Digital Technician II, Dyna, Electra Glide, Evolution, Fat Bob,
Fat Boy, Forty-Eight, Glaze, Gloss, H-D, H-Dnet.com, Harley,
Harley-Davidson, HD, Heritage Softail, Iron 883, Low Rider,
Night Rod, Nightster, Night Train, Profile, Revolution, Road
Glide, Road King, Road Tech, Rocker, Screamin' Eagle, Sev-
enty-Two, Softail, Sportster, Street Glide, Street Rod, Sun Ray,
Sunwash, Super Glide, SuperLow, Switchback, SYN3, Tech-
Link, TechLink II, Tour-Pak, Twin Cam 88, Twin Cam 88B,
Twin Cam 96, Twin Cam 96B, Twin Cam 103, Twin Cam 103B,
Twin Cam 110, Twin Cam 110B, Ultra Classic, V-Rod, VRSC,
XR1200X and Harley-Davidson Genuine Motor Parts and
Genuine Motor Accessories are among the trademarks of H-
D Michigan, Inc.
CONTENTS
All photographs, illustrations and procedures may not neces-
sarily depict the most current model or component, but are
based on the latest production information available at the time
of publication.
Since product improvement is our continual goal, Harley-Dav-
idson reserves the right to change specifications, equipment
or designs at any time without notice and without incurring
obligation.
II FOREWORD