{"nhtsa_id":11021571,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-08-06","date":"2025-07-28","document_id":"9100629","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Before replacing the Headlamp Switch, due to an issue on the Dimmers. Please follow the next steps to corroborate if the Headlamp Switch is malfunctioning: 1.- Please disconnect and reconnect the headlamp Switch. And verify if the issue is corrected. If it is the Instrument panel Dimmer (Right Dimmer) 2.- Review the resistance value between Pins 6 & 3. The value should be around 5.76 KOhms, when in the lowest position to 311 ohms in the top position (Parade Detent). If it is the ambient light dimmer (Left Dimmer) 2.- Review the resistance value between Pins 8 & 3. The value should be around 14.55 KOhms, when in the lowest position (Dome defeat) to 182 ohms in the top position If a problem is found in the resistor values. Please replace the Switch.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11021571-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11021571-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11021571","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2023,"year_to":2025,"match":"exact","vehicle_ids":["2023_jeep_grand-wagoneer","2024_jeep_grand-wagoneer","2025_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2023,"year_to":2025,"match":"exact","vehicle_ids":["2023_jeep_wagoneer","2024_jeep_wagoneer","2025_jeep_wagoneer"]}],"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":[]}