Headlamps Turn On By Themselves When Vehicle Is Off – DTC B1533 – 2021-2022 Ford F-150
NHTSA ID Number: 10228861 Manufacturer Communication Number: SSM 51244 Summary Some 2021-2022 F-150 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 …