Hazard lamps flashing one time intermittently when the hazard lamps are turned off

Bulletin number

TSB 21-2456

Component

Electrical system: body control module: software

Summary

Some 2021 Bronco vehicles equipped with exterior zone lighting may experience the hazard lamps flashing one time intermittently when the hazard lamps are turned off. This condition is due to the body control module (BCM) software. This condition occurs when zone lighting is activated then deactivated while the engine is OFF, or during an engine auto-start-stop event. To correct this condition, follow the Service Procedure to reprogram the BCM.

Owners of these vehicles have filed 29 complaints in the electrical category.