{"nhtsa_id":11036543,"type":"other","type_name":"Other","date_added":"2026-09-01","date":"2026-08-28","document_id":"MCD-017","mfr_campaign":"MCD-017","replaces":null,"component":"EXTERIOR LIGHTING; ELECTRICAL SYSTEM","mfr_system":null,"summary":"On certain 2027 Allegro Bus motorhomes, the tail light parameters were not correct. The turn signal would activate correctly, but once the brake was applied the brake light would override the turn signal. Instead of updating the parameters in production, the wiring was modified.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036543-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11036543-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11036543","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"lighting","name":"Lighting","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"TIFFIN","model":"ALLEGRO BUS","year_from":2027,"year_to":2027,"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":[]}