2003 Harley-Davidson Softail FXST, FXSTB, FXSTS, FLSTC, FLSTF, FLSTS, FXSTD Service Manual (P/N 99482-03)

The 2003 Harley-Davidson Softail Service Manual (P/N 99482-03) and Electrical Diagnostics Manual (P/N 99498-03) cover FXST/FXSTI, FXSTB/FXSTBI, FXSTS/FXSTSI, FLSTC/FLSTCI, FLSTF/FLSTFI, FLSTS/FLSTSI, and FXSTD/FXSTDI, with carbureted and EFI configurations.

Both publications are combined in one 946-page PDF, including the shared contents page and appendices.

• Engine repair: Top- and bottom-end overhaul, counterbalancer repair, cam support plate service, oil-pressure testing, and hydraulic lifter inspection and replacement.

• Drive and transmission: Primary chaincase service, clutch disassembly, drive-belt replacement, and five-speed transmission mainshaft, countershaft, and shifter inspection.

• Chassis service: Wheel lacing and truing, sealed wheel bearing replacement, steering head adjustment, and separate FLSTS/FXSTS Springer fork procedures.

• Fuel systems: C.V. carburetor inspection and adjustment, EFI component replacement, fuel-pressure testing, and fuel pump and pressure regulator service.

• Electrical diagnosis: Starter and charging-system tests, carbureted/EFI trouble-code charts, sensor circuit diagnosis, and intermittent-fault testing.

• Security and turn signals: Turn Signal Module (TSM) and Turn Signal Security Module (TSSM) diagnosis, key fob assignment, and EFI ECM password learning.

This manual suits technicians comfortable with internal engine repair and electrical circuit testing, with access to the specified measuring tools and diagnostic equipment.

Twin Cam 88B Engine Repair

The engine sections distinguish top-end and cam-compartment work with the engine in the chassis from flywheel-compartment repair requiring engine removal and crankcase separation. Counterbalancer coverage includes bearing replacement, sprocket alignment, balance-chain timing, and hydraulic tensioner leakdown testing.

Early- and late-style pistons have separate identification and measuring instructions, helping you choose the applicable clearance check before judging piston or cylinder wear. Illustrations such as Engine Oil Flow: Top End trace the lubrication system.

Cam support plate cautions explain how incorrect crankshaft-bushing removal can damage its bore. Uncontrolled release of a cam-chain tensioner can crack its shoe or stretch its spring.

Primary Drive, Transmission, and Chassis

Clutch coverage separates clutch-pack service from hub and bearing disassembly. Transmission Power Flow diagrams accompany gear, shaft, and shifter inspection procedures.

Chassis sections distinguish hydraulic forks from the FLSTS/FXSTS Springer assemblies, including steering head bearing fall-away adjustment, Springer rocker bearing service, and model-specific front brake caliper work. Scheduled maintenance covers rear belt deflection and wheel spoke tension; brake procedures include bleeding the D.O.T. 5 silicone system.

Motorcycle service involves physical risks; use appropriate protective equipment and ensure your workspace is stable and secure before starting maintenance.

Carburetor and EFI Service

Carburetor procedures cover vacuum-piston checks, float adjustment, and enrichener service. EFI repair coverage extends to the induction module, injectors, Idle Air Control (IAC), fuel pump, and fuel pressure regulator removal and installation.

Diagnostic charts address the Manifold Absolute Pressure (MAP), Crank Position (CKP), Vehicle Speed (VSS), Engine Temperature (ET), Intake Air Temperature (IAT), and Throttle Position (TP) sensors. EFI idle adjustment calls for Scanalyzer HD-41325-D or Digital Technician HD-44750.

Electrical Troubleshooting and Wiring

The separate Electrical Diagnostics Manual adds no-start, starts-then-stalls, misfire, and charging-system fault isolation. Breakout box HD-42682 supports carbureted ignition and TSM/TSSM circuit checks; HD-43876 serves the EFI system. Scanalyzer diagnosis of the TSM/TSSM is limited to EFI models.

TSM/TSSM Connector Pins views and the carbureted and EFI Main Harness diagrams identify connections for circuit testing. Ignition coil coverage is testing and replacement; the coil is not internally repairable.

Wiring coverage: The electrical-diagnostics section contains the 2003 diagrams. The service appendix also contains two 21-page wiring sets labeled 2001, with some differing details; these should not be treated as interchangeable with the 2003 sheets.

Torque, Fluid, and Inspection Specifications

Component-specific torque tables, fluid capacities, service wear limits, clearances, adjustment data, and electrical test values accompany the repair sections. The tool appendix identifies specialty equipment by part number, including balance shaft bearing remover/installer HD-44066.

PDF Contents, Search, and Navigation

The file contains 612 service-manual pages, 333 electrical-diagnostics pages, and one shared contents page; appendices, both older wiring sets, blank pages, and notes pages are included in these counts. Text search works across both manuals, and embedded bookmarks cover their chapters, although the top-level Electrical Diagnostics bookmark points to the service contents. Small wiring labels require zooming.