This manual provides information on how to use the electrical diagnostic system, including trouble code retrieval, clearing and analysis, and electrical system troubleshooting to help diagnose electrical problems with Harley-Davidson® Softail® models.
This manual provides detailed diagnostic procedures for electrical systems in 2018 Harley-Davidson Softail® models. It covers troubleshooting voltage drops, CAN communication, starting and charging systems, instrument panels, security systems, and engine management. Sections include diagnostic tools, trouble codes, component testing, and wiring diagrams.
The manual also includes specifications for key components such as the battery, spark plugs, ignition coil, starter, alternator, and regulator. It is intended for professional technicians and includes safety warnings and service guidelines to ensure proper maintenance and rider safety.
| Fuel System Type | Recommended fuel 91 Octane |
|---|---|
| Fuel Pump Pressure | Normal 376–425 kPa (54–62 psi) |
| Idle Speed | Normal idle speed 850 RPM |
| Battery Specifications | 12 V/ 17.5 Ah/315 CCA, Sealed, AGM (Absorbed glass mat) battery |
| Spark Plug Gap | .031-.035 in. (.80-.90 mm) |
| Starter Cranking Current | 250 A maximum |
| Alternator Output | 16-28 VAC per 1,000 rpm |
The recommended fuel type is 91 Octane.
The normal idle speed is 850 RPM.
The cranking current is 250 A maximum.
The voltage output is 16-28 VAC per 1,000 rpm.