{"nhtsa_id":11038444,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-13","date":"2026-10-12","document_id":"SSM 55239","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER; ELECTRICAL SYSTEM; SERVICE BRAKES","mfr_system":null,"summary":"Some 2023-2026 F-Super Duty vehicles equipped with a trailer brake control module and built on or before 08-May-2026 may exhibit a \"Trailer Disconnected\" message after cycling the ignition off and back on with a trailer connected. This may be due to the presence of an integrated battery charger on a trailer equipped with electric over hydraulic brakes. If trailer functionality is restored after unplugging and plugging the trailer connector back in while the ignition is on, this condition can be corrected by downloading and performing the \"Trailer Brake Configuration\" application using the latest software version of the Ford Diagnosis and Repair System (FDRS) scan tool. For claiming, use causal part 19H332 and labor operations 12651D and 12651D4. Workshop Manual (WSM), Section 417-01 Exterior Lighting > Diagnosis and Testing > Trailer Lamps > Pinpoint Test G The Message Center Displays A False Trailer Disconnected Message When A Trailer Is Connected To The Vehicle - Only For Electric Over Hydraulic (EOH) Equipped Trailers When Vehicle Trailer Brake Type Setting Is Set To Electric Over Hydraulic has bee","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038444-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038444-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11038444","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-250 SD","year_from":2023,"year_to":2026,"match":"base","vehicle_ids":["2023_ford_f-250","2024_ford_f-250","2025_ford_f-250","2026_ford_f-250"]},{"make":"FORD","model":"F-350 SD","year_from":2023,"year_to":2026,"match":"base","vehicle_ids":["2023_ford_f-350","2024_ford_f-350","2025_ford_f-350","2026_ford_f-350"]},{"make":"FORD","model":"F-450 SD","year_from":2023,"year_to":2026,"match":"base","vehicle_ids":["2023_ford_f-450","2024_ford_f-450","2025_ford_f-450","2026_ford_f-450"]},{"make":"FORD","model":"F-550 SD","year_from":2023,"year_to":2026,"match":"base","vehicle_ids":["2023_ford_f-550","2024_ford_f-550","2025_ford_f-550","2026_ford_f-550"]}],"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":[]}