{"nhtsa_id":10147411,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2018-11-13","date":"2018-10-04","document_id":"1HD-S7Z8E-11","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"SERVICE BULLETIN M1479: 2018 - 2019 SOFTAIL - INSTRUMENT SOFTWARE UPDATE - BATTERY DRAIN. REVISION. Purpose: This bulletin informs dealers of a speedometer software update to address incorrect activation of transport mode. The current software results in the speedometer keeping the CAN (Controller area network) signal active after the vehicle run switch is turned off. This causes the battery to drain after a few days of non-use. The reflash corrects the issue in the software programming and prevents the issue from occurring in the future.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10147411-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2018/MC-10147411-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10147411","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"HARLEY-DAVIDSON","year_from":null,"year_to":null,"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":[]}