# Service bulletin M1557

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.

- Type: Service bulletin
- NHTSA id: 10217255
- Published by NHTSA: 2022\-08\-05
- Manufacturer's number: M1557
- Manufacturer's date: 2022\-07\-11
- NHTSA component: SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM

## NHTSA's summary

SERVICE BULLETIN M1557: TOURING AND TRIKE REAR BRAKE SWITCH. PURPOSE: This bulletin informs dealers that Harley\-Davidson has a mid year change in how the Touring and Trike vehicles receive its rear brake signal input. The Touring and Trike vehicles will now receive rear brake input signal from a brake switch and will no longer activate the brake light based on rear brake pressure in the Electro Hydraulic Control Unit \(EHCU\). 2022 Electrical Diagnostic Manual \(EDM\) and Service Manual will be updated with this change. See Service Information Portal \(SIP\) for electronic version of manuals.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10217255-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10217255-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Electrical system

## Vehicles listed

- 2022 HARLEY\-DAVIDSON FLHP
- 2022 HARLEY\-DAVIDSON FLHR
- 2022 HARLEY\-DAVIDSON FLHRXS
- 2022 HARLEY\-DAVIDSON FLHT
- 2022 HARLEY\-DAVIDSON FLHTCUTG
- 2022 HARLEY\-DAVIDSON FLHTCUTGSE
- 2022 HARLEY\-DAVIDSON FLHTK
- 2022 HARLEY\-DAVIDSON FLHTP
- 2022 HARLEY\-DAVIDSON FLHX
- 2022 HARLEY\-DAVIDSON FLHXS
- 2022 HARLEY\-DAVIDSON FLHXST
- 2022 HARLEY\-DAVIDSON FLRT
- 2022 HARLEY\-DAVIDSON FLTRK
- 2022 HARLEY\-DAVIDSON FLTRKSE
- 2022 HARLEY\-DAVIDSON FLTRX
- 2022 HARLEY\-DAVIDSON FLTRXS
- 2022 HARLEY\-DAVIDSON FLTRXSE
- 2022 HARLEY\-DAVIDSON FLTRXST

JSON: [/v1/bulletins/10217255](/v1/bulletins/10217255)

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