{"nhtsa_id":11019749,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-06-26","date":"2025-07-03","document_id":"SIL-3227","mfr_campaign":"SIL-3227","replaces":null,"component":"SERVICE BRAKES; UNKNOWN OR OTHER; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Altec has learned that the trailer wiring harness on certain Freightliner chassis with Altec forestry bodies manufactured from July 2021 to February 2025 supplies constant voltage to the trailer brakes, causing the trailer brakes to always be engaged.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11019749-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11019749-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11019749","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"ALTEC","model":"FORESTRY BODY","year_from":2021,"year_to":2025,"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":[]}