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Service bulletin TT473

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10182338
Published by NHTSA2020-11-06
Manufacturer's numberTT473
Manufacturer's date2020-10-02
NHTSA componentEQUIPMENT

NHTSA's summary

TECHNICAL TIP BULLETIN TT473: SYMPTOM BASED DIAGNOSTICS. PURPOSE: To assist the technician with diagnostics based on symptoms. These tips are suggestions that may help in troubleshooting the customer concerns. Harley-Davidson recommends that this bulletin is viewed on Service Information Portal (SIP) only. Viewing this bulletin in a Portable Document Format (PDF) results in the loss of working links.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories

Vehicles listed
HARLEY-DAVIDSON HARLEY-DAVIDSON

Listing a model year does not mean every vehicle of it is concerned: the document says which.