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. Starting / Charging 1 Instruments 2 TSM/HFSM 3 Engine Management 4 Appendix A Connector Repair A Appendix B Wiring B Appendix C Conversions C Appendix D Glossary D Appendix E TSM/TSSM (Japan/Korea) E Use the TABLE OF CONTENTS (which follows this FORE- WORD) and the INDEX (at the back of this manual) to quickly locate subjects. Sections and topics in this manual are sequentially numbered for easy navigation. For example, a cross-reference shown as 2.1 SPECIFICA- TIONS refers to chapter 2 CHASSIS, heading 2.1 SPECIFIC- ATIONS. For quick and easy reference, all pages contain a section number followed by a page number. For example, page 3-5 refers to page 5 in section 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 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. A clean work area at the start of each job will allow you to perform the repair as easily and quickly as possible, and will reduce the incidence of misplaced tools and parts. A motorcycle that is excessively dirty should be cleaned before work starts. Cleaning will occasionally uncover sources of trouble. Tools, instruments and any parts needed for the job should be gathered before work is started. Interrupting a job to locate tools or parts is a distraction and causes needless delay. NOTES • To avoid unnecessary disassembly, carefully read all rel- ative service information before repair work is started. • 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), you must first disarm the security system. Either keep the fob in close proximity to the vehicle, or use Digital Technician to disable the security system while the vehicle is being serviced and re-enable the system after service is completed. SERVICE BULLETINS In addition to the information presented in this Service Manual, Harley-Davidson Motor Company will periodically issue Service Bulletins 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 Do not use aftermarket parts and custom made front forks which can adversely affect performance and handling. Removing or altering factory installed parts can adversely affect performance and could result in death or serious injury. (00001a) To ensure 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 service 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) CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage. (00140a) 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 service 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 service manual. However, please remember that these warnings are not all-inclusive. Inadequate safety precau- tions 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, please contact Loctite Corp. at www.loctite.com. PRODUCT REGISTERED MARKS Allen, Amp Multilock, Bluetooth, Brembo, Delphi, Deutsch, Dunlop, Dynojet, Fluke, G.E. Versilube, Gunk, Hydroseal, Hylomar, Kevlar, Lexan, Loctite, Lubriplate, Keps, K&N, Mag- naflux, Marson Thread-Setter Tool Kit, MAXI fuse, Molex, MPZ, Mulitilock, Novus, Packard, Pirelli, Permatex, Philips, PJ1, Pozidriv, Robinair, S100, Sems, Snap-on, Teflon, Threadlocker, Torca, Torco, TORX, Tufoil, Tyco, Ultratorch, Velcro, X-Acto, and XM Satellite Radio are among the trademarks of their respective owners. H-D MICHIGAN, INC. TRADEMARK INFORMATION Harley, Harley-Davidson, H-D, Bar & Shield, Digital Tech, Digital Technician, Destroyer, Deuce, Dyna, Electra Glide, Evolution, Fat Boy, Glaze, Gloss, H-D, H-Dnet.com, HD, Harley, Heritage Softail, Heritage Springer, Low Rider, Night Rod, Night Train, Profile, Revolution, Road Glide, Road King, Rocker, Softail, Sportster, Sun Ray, Sunwash, Tech Link, Twin Cam 88, Twin Cam 88B, Twin Cam 96, Twin Cam 96B, Twin Cam 103, Twin Cam 103B, Twin Cam 110, Twin Cam 110B, Tour- Pak, Screamin' Eagle, Softail, Super Guide, Super Premium, SYN3, Ultra Glide, V-Rod, VRSC, V-Rod, VRSC, Wide Glide, 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
STARTING / CHARGING 1.1 STARTER TROUBLESHOOTING General...............................................................................1-1 Starter Troubleshooting......................................................1-1 1.2 STARTING SYSTEM DIAGNOSIS Diagnostics.........................................................................1-3 Diagnostic Notes.........................................................1-3 Job/Time Code Values................................................1-3 1.3 DIAGNOSTICS/TROUBLESHOOTING Voltage Drop.....................................................................1-13 1.4 STARTER ACTIVATION CIRCUITS Starter Activation Circuits.................................................1-14 1.5 TESTING STARTER ON MOTORCYCLE Start Relay Test................................................................1-15 Starter Current Draw Test.................................................1-16 1.6 TESTING STARTER ON BENCH Free Running Current Draw Test......................................1-17 Starter Solenoid................................................................1-17 Solenoid Pull-In Test.........................................................1-17 Solenoid Hold-In Test........................................................1-17 Solenoid Return Test........................................................1-18 1.7 CHARGING SYSTEM General.............................................................................1-19 Alternator...................................................................1-19 Voltage Regulator......................................................1-19 Troubleshooting................................................................1-19 Battery.......................................................................1-19 Wiring........................................................................1-19 Job/Time Code Values..............................................1-19 Testing..............................................................................1-23 Milliampere Draw Test...............................................1-23 Total Current Draw Test.............................................1-23 Current and Voltage Output Test: Using HD-48053....1-24 Current and Voltage Output Test: Using Load Tester.........................................................................1-24 Stator Check..............................................................1-25 AC Output Check......................................................1-25 1.8 BATTERY TESTING General.............................................................................1-27 Voltmeter Test...................................................................1-27 Conductance Test.............................................................1-27 Load Test..........................................................................1-27 INSTRUMENTS 2.1 CHECKING FOR DIAGNOSTIC TROUBLE CODES Check Engine Lamp...........................................................2-1 Security Lamp....................................................................2-2 Turn Signal Module (TSM)..........................................2-2 Turn Signal Security Module (TSSM) or Hands-Free Security Module (HFSM).............................................2-2 Code Types.........................................................................2-2 Current........................................................................2-3 Historic........................................................................2-3 Retrieving Diagnostic Trouble Codes..................................2-3 Multiple Diagnostic Trouble Codes.....................................2-3 2.2 INITIAL DIAGNOSTIC CHECK: SPEEDOMETER General...............................................................................2-4 Diagnostic Notes.........................................................2-4 Circuit Diagram/Wire Harness Connector Table..........2-4 Job/Time Code Values................................................2-4 Reprogramming ECM..................................................2-4 Initial Diagnostics...............................................................2-4 Diagnostic Tips............................................................2-4 Diagnostic Notes.........................................................2-5 Other Diagnostic Trouble Codes..................................2-5 2.3 SPEEDOMETER SELF DIAGNOSTICS General.............................................................................2-10 Diagnostics.......................................................................2-10 Diagnostic Tips..........................................................2-10 Diagnostic Notes.......................................................2-10 2.4 SPEEDOMETER General.............................................................................2-12 Trip Odometer Reset Switch.....................................2-12 Speedometer Theory of Operation...................................2-12 Odometer Theory of Operation.........................................2-12 2.5 BREAKOUT BOX: SPEEDOMETER General.............................................................................2-13 Installation........................................................................2-13 Removal...........................................................................2-13 2.6 FUEL GAUGE Theory of Operation.........................................................2-14 Fuel Gauge and Sender Test............................................2-14 2.7 INDICATOR LAMPS General.............................................................................2-15 Job/Time Code Values..............................................2-15 Diagnostics.......................................................................2-16 Diagnostic Notes.......................................................2-16 2.8 DTC B1004, B1005 General.............................................................................2-19 Diagnostics.......................................................................2-19 Diagnostic Tips..........................................................2-19 Diagnostic Notes.......................................................2-19 2.9 DTC B1006, B1007 General.............................................................................2-23 Accessory or Ignition Line Overvoltage.....................2-23 2.10 DTC B1008 General.............................................................................2-25 Trip Odometer Reset Switch Closed.........................2-25 Diagnostics.......................................................................2-25 Diagnostic Notes.......................................................2-25 2.11 DTC U1016, U1255 General.............................................................................2-28 Loss of ECM Serial Data...........................................2-28 Diagnostics.......................................................................2-28 Diagnostic Notes.......................................................2-28 2.12 DTC U1064, U1255 General.............................................................................2-31 III TABLE OF CONTENTS
Loss of TSM/TSSM/HFSM Serial Data.....................2-31 Diagnostics.......................................................................2-31 Diagnostic Notes.......................................................2-31 2.13 DTC U1300, U1301 OR BUS ER General.............................................................................2-34 Serial Data Low or Serial Data Open/High................2-34 Diagnostics.......................................................................2-34 Diagnostic Tips..........................................................2-34 Diagnostic Notes.......................................................2-34 TSM/HFSM 3.1 TURN SIGNAL OVERVIEW General...............................................................................3-1 Security System: Japan/Korea...........................................3-1 Turn Signal Functions.........................................................3-1 Manual Cancellation...........................................................3-1 Automatic Cancellation.......................................................3-1 Bank Angle Functions........................................................3-1 Bank Angle Restart............................................................3-1 Clutch/Neutral Interlock......................................................3-1 Security System H-DSSS...................................................3-1 3.2 HARLEY-DAVIDSON SMART SECURITY SYSTEM Components.......................................................................3-2 Security Immobilization......................................................3-2 HFSM Features..................................................................3-3 3.3 H-DSSS ACTUATION General...............................................................................3-5 Sidecar Configuration.........................................................3-5 Actuation............................................................................3-5 Fob Assignment..................................................................3-5 Power Disruption and Configuring......................................3-5 3.4 PERSONAL IDENTIFICATION NUMBER (PIN) General...............................................................................3-6 Initial Pin Entry...................................................................3-6 Changing the Pin................................................................3-6 Modifying an Existing Pin............................................3-6 3.5 ARMING/DISARMING SECURITY SYSTEM Hands-Free Fob..................................................................3-8 Security Lamp (Key Icon)...................................................3-8 Arming................................................................................3-8 Disarming...........................................................................3-9 Disarming with a Personal Identification Number (PIN).....3-9 3.6 WARNINGS AND ALARMS Warnings..........................................................................3-10 Alarm................................................................................3-10 Activation...................................................................3-10 Deactivation...............................................................3-10 Siren Chirp Mode (Confirmation)......................................3-10 Chirpless Mode.........................................................3-10 Chirp Mode................................................................3-10 Switching Modes.......................................................3-10 3.7 SERVICE/EMERGENCY FUNCTIONS Transport Mode................................................................3-11 To Enter Transport Mode...........................................3-11 To Exit Transport Mode..............................................3-11 Service Mode...................................................................3-11 Four-Way Flashing...........................................................3-11 To Arm the HFSM with the Hazard Warning Flashers ON.............................................................................3-11 To Disarm the HFSM and Turn the Hazard Warning Flashers OFF............................................................3-11 3.8 TROUBLESHOOTING Turn Signals (TSM/HFSM)...............................................3-12 Security System (HFSM)..................................................3-12 Diagnostics Mode.............................................................3-12 Troubleshooting................................................................3-12 3.9 CHECKING FOR DIAGNOSTIC TROUBLE CODES General.............................................................................3-13 Security/Lamp Diagnostics...............................................3-13 Code Types.......................................................................3-14 Current......................................................................3-14 Historic......................................................................3-14 Retrieving DTCs...............................................................3-14 Multiple DTCs/Priority Order............................................3-15 3.10 INITIAL DIAGNOSTIC CHECK: TSM/HFSM General.............................................................................3-16 Diagnostic Notes.......................................................3-16 Circuit Diagram/Wire Harness Connector Table........3-16 Job/Time Codes........................................................3-16 Reprogramming ECM................................................3-16 Initial Diagnostics.............................................................3-16 Diagnostic Tips..........................................................3-16 Diagnostic Notes.......................................................3-16 Other Diagnostic Trouble Codes (DTCs)...................3-17 3.11 SPEEDOMETER SELF DIAGNOSTICS General.............................................................................3-21 Diagnostics.......................................................................3-21 Diagnostic Tips..........................................................3-21 Diagnostic Notes.......................................................3-21 3.12 BREAKOUT BOX:TSM/HFSM General.............................................................................3-23 Installation........................................................................3-23 Removal...........................................................................3-23 3.13 FAILS TO DISARM (HFSM ONLY) General.............................................................................3-24 Job/Time Codes...............................................................3-24 Diagnostics.......................................................................3-24 Diagnostic Tips..........................................................3-24 Diagnostic Notes.......................................................3-24 IV TABLE OF CONTENTS TABLE OF CONTENTS
Keep your 2008 Harley-Davidson Softail motorcycle running at its best with this comprehensive Service & Repair Manual. Perfect for Harley-Davidson enthusiasts and motorcycle technicians, this manual provides detailed instructions for maintenance, troubleshooting, and repairs specific to 2008 Softail models. It includes step-by-step procedures, clear illustrations, and thorough exploded-view diagrams.
The 2008 Harley-Davidson Softail models, celebrated for their classic design and powerful performance, require precise maintenance and skilled repairs to maintain their iconic status. This manual offers all the expert knowledge and procedures recommended by Harley-Davidson, covering a wide range of service and repair topics.
From engine and transmission work to electrical system diagnostics and cosmetic care, this manual covers an extensive array of topics. The instructions are clear and straightforward, supported by detailed visuals, making maintenance and repair tasks accessible for both seasoned mechanics and DIY motorcycle owners.
Presented in a digital format, this manual is accessible on various devices, including PCs, tablets, and smartphones. This format allows for efficient searching and navigation, enhancing your repair experience over traditional paper manuals. It's an invaluable resource for ensuring your 2008 Harley-Davidson Softail remains a stunning and high-performing ride.
Printable: Yes
Language: English
Compatibility: Compatible across a wide range of devices including PCs, Macs, smartphones, and tablets.
Requirements: A PDF reader like Adobe Reader (free)
Models covered:
FLSTF
FLSTSB
FXCW
FXCWC
FLSTN
FLSTF
FLST
FLSTC
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2008 Harley-Davidson Softail Models Service & Repair Manual