NHTSA ID Number: 10227221
Manufacturer Communication Number: M1557
TSB/Document Date: 2022-12-06
Summary
SERVICE BULLETIN M1557: TOURING AND TRIKE REAR BRAKE SWITCH. PURPOSE: Revision. 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. NOTE: For information regarding brake switch signal changes on 2019 to 2022 Trike/CVO Trike and 2020 to 2022 Touring/Police Touring/CVO Touring vehicles built prior to the Vehicle Identification Numbers (VINs) noted in the bulletin below, see Service Bulletin M1568: Recall 0635.
M1557
2022-11-03
M1557: TOURING AND TRIKE REAR BRAKE SWITCH
Reason for Revision
1726760
Refer to Table 1.
Table 1. Document History
Date
Revision Description
Revised: Reason for Revision table.
2022-11-03
* Updated Reason for Revision
Added: Note and graphics. Updated: Informa2022-10-26 tion in Trike Vehicles and Touring Vehicles .
* Updated Purpose for Service Bulletin
2022-07-11 Initial release
Purpose for Service Bulletin
NOTE
For information regarding brake switch signal changes on
2019 to 2022 Trike/CVO Trike and 2020 to 2022 Touring/Police
Touring/CVO Touring vehicles built prior to the Vehicle
Identification Numbers (VINs) noted in the bulletin below, see
Service Bulletin M1568: Recall 0635.
Figure 1. Rear Brake Switch
Motorcycles Affected
Table 2. Platforms
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.
Year
Platform
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).
Touring
2022 Electrical Diagnostic Manual (EDM) and Service Manual
will be updated with this change. See Service Information Portal
(SIP) for electronic version of manuals.
2022
Trike vehicles: Starting on Vehicle Identification Number (VIN)
build date June 24, 2022 with VIN 1HD1MAF13NB854022, will
now be equipped with a rear brake switch located at the rear
master cylinder inlet line on the EHCU and the Body Control
Module (BCM) will be calibrated to utilize the factory installed
brake switch. This includes the addition of two wires to the main
harness.
• BCM: [242B] terminal F3 to rear brake switch [121B-1]
terminal 1 (BE/GN).
• [121B-2] terminal 1 to Ground (GND) (BK).
Touring vehicles: Starting on VIN build date June 24, 2022
with VIN 1HD1KBC16NB645227, the BCM will be calibrated
to utilize the factory install rear brake switch.
Police Touring
Trike
CVO Touring
CVO Trike
Model
FLHR
FLHRXS
FLHT
FLHTK
FLHX
FLHXS
FLHXST
FLTRK
FLTRX
FLTRXS
FLTRXST
FLHP
FLHTP
FLHTCUTG
FLRT
FLHXSE
FLTRKSE
FLTRXSE
FLHTCUTGSE
Markets Affected
All markets are affected.
NOTE
In the interest of preserving customer safety and satisfaction, always check for outstanding recalls whenever any motorcycle is brought into your dealership for either maintenance or service.
ROUTING
INITIAL HERE
SERVICE
MANAGER
SALES MANAGER PARTS MANAGER
WARRANTY
PROCESS
MANAGER
LEAD TECHNICIAN TECHNICIAN NO. 1 TECHNICIAN NO. 2 TECHNICIAN NO. 3 RETURN THIS TO
Required Dealer Action
Table 3.
Action
Required
NO
YES
2/2
Resolution
Non-Actionable:
This is for informational purposes only or a technical tip.
M1557
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
- Delivers braking power when needed by avoiding a spongy...
- Both wet and dry boiling points exceed the minimum...
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TSB/Document ID: M1557
Replacement Service Bulletin Number:
MFR Communication Date: 2022-11-03
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, HYDRAULIC
MFR Component System:
MFR Component Subsystem:
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