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February 25, 2026 Service bulletin

Dtii update procedure for software version (26.4.3)

Harley-Davidson technical service bulletin M1713 for 2016-2019 Harley-Davidson Flhtcu, 2016-2026 Harley-Davidson FLHX and 2016-2024 Harley-Davidson Flhtk and others.

Bulletin number
M1713
Component
Electrical system
Summary
SERVICE BULLETIN M1713 (REV C): DTII UPDATE PROCEDURE FOR SOFTWARE VERSION (26.4.3). PURPOSE: Revision C. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 2025. The issue prevents automatic software updates to be installed on your DT II computer. A manual installation of the latest DT II software version (26.4.3) will need to be performed if current DT II software version is (26.0.2), to allow future automatic updates. If a manual update to (26.1.5) or (26.3.2) has previously been completed, DT II will automatically update to (26.4.3) and no additional action is needed.. Revision C. Updated: Purpose for Service Bulletin and Required Dealer Action. Updated to Software Version (26.4.3).

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