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Service bulletin SB-54-1

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 id10058907
Published by NHTSA2015-12-16
Manufacturer's numberSB-54-1
Manufacturer's date2015-08-01
NHTSA componentEXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH; EXTERIOR LIGHTING:TURN SIGNAL:SWITCH

NHTSA's summary

WESTERN STAR: BRAKE SIGNAL OVERRIDES TURN SIGNAL UNDER NORMAL OPERATIONS, DUE TO TURN SIGNAL SWITCHES AND STOP/TURN LAMPS ARE SHARING SAME FILAMENT AND SOME TRUCKS WANT 4 WAY FLASHERS TO OVERRIDE SELF CANCELLING TURN SIGNAL SWITCHES. NO MODEL YEARS LISTED. CONSTELLATION, HERITAGE, 4700, 4800, 4900, 5700, 5900, 6900. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Lighting, Brake lights, Turn signals

Vehicles listed
WESTERN STAR 47002016
WESTERN STAR 48002015
WESTERN STAR 49002016
WESTERN STAR 57002015
WESTERN STAR 69002015
WESTERN STAR CONSTELLATION2012
WESTERN STAR HERITAGE1999

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

Recalls for the same vehicles and component
17V7610002017-11-27. EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH; EXTERIOR LIGHTING:BRAKE LIGHTS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
FL7562018-12-10. Service bulletin. FL756 Brake Light Pressure Switches
FL7562018-10-01. Service bulletin. FL756 Brake Light Pressure Switches
FL7562018-06-18. Service bulletin. FL756 Brake Light Pressure Switches