Harley-Davidson Low Rider, Super Glide, Super Glide Sport, Wide Glide, and Low Rider, FXD Dyna/FXDL/FXDX/FXDWG 2004 Service Manual

• Details 2004 Dyna FXD, FXDL, FXDX, and FXDWG models, featuring comprehensive documentation for starter systems, charging circuits, and instrument diagnostics
• Official factory publication, originally released in 2004
• Includes 46 detailed wiring diagrams and electrical schematics, 14 diagnostic flow charts, and 9 technical data specification tables
• The definitive factory reference for integrating 2004 Dyna electronic fuel injection (EFI) and carbureted ignition systems

Instrument and Electrical Diagnostics

This manual outlines the electrical architecture for the 2004 Dyna lineup. It focuses heavily on starting systems, charging circuit integrity, and instrument cluster troubleshooting. The publication details the operation of the turn signal module (TSM) and turn signal security module (TSSM), covering security alarm configuration, key fob assignment, and personal code entry protocols. For dashboard issues, the text maps out diagnostic routines for the speedometer and tachometer. It explains the correct interface with OEM breakout boxes and instrument harness adapters to isolate faults in the serial data bus and power supply. As with all high-amperage motorcycle electrical systems, reviewing these factory schematics prior to testing ensures proper circuit isolation and helps prevent module damage or personal injury.

Specification and Reference Data

Accurate technical data is essential for component verification across both EFI and carbureted Twin Cam platforms. The manual lists standard operational parameters, such as a stator resistance of 0.1–0.3 ohms and an ignition coil primary resistance of 0.5–0.7 ohms. It also notes the expected starter system current draw at 160–200 amperes during normal engine cranking. This official workshop resource delivers the precise specifications required to confidently evaluate charging, security, instrument, and ignition systems on 2004 Dyna models.