Headlamps Turn On By Themselves When Vehicle Is Off – DTC B1533 – 2018-2022 Ford Expedition
NHTSA ID Number: 10230964 Manufacturer Communication Number: SSM 51321 Summary Some 2018-2022 Expedition vehicles may exhibit a condition of intermittent headlamp operation while the vehicle is OFF and have diagnostic trouble code (DTC) B1533 stored in the body control module (BCM). This may be due to the internal logic within the headlamp switch. Switch and/or module replacement …