{"nhtsa_id":10058907,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2015-12-16","date":"2015-08-01","document_id":"SB-54-1","mfr_campaign":null,"replaces":null,"component":"EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH; EXTERIOR LIGHTING:TURN SIGNAL:SWITCH","mfr_system":null,"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","document":null,"url":"https://open.wenmarpro.com/bulletins/10058907","components":[{"id":"lighting","name":"Lighting","parent":null},{"id":"brake-light","name":"Brake lights","parent":"lighting"},{"id":"turn-signal","name":"Turn signals","parent":"lighting"}],"codes":[],"topics":[],"vehicles":[{"make":"WESTERN STAR","model":"4700","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_western-star_4700"]},{"make":"WESTERN STAR","model":"4800","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_western-star_4800"]},{"make":"WESTERN STAR","model":"4900","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_western-star_4900"]},{"make":"WESTERN STAR","model":"5700","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_western-star_5700"]},{"make":"WESTERN STAR","model":"6900","year_from":2015,"year_to":2015,"match":"exact","vehicle_ids":["2015_western-star_6900"]},{"make":"WESTERN STAR","model":"CONSTELLATION","year_from":2012,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"WESTERN STAR","model":"HERITAGE","year_from":1999,"year_to":1999,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"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.","attribution":[]}