B1049
Driver Airbag Module Circuit Open
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Code B1049 indicates an open circuit in the driver's airbag module deployment loop. This is a manufacturer-specific code most commonly seen on Ford and some other vehicles. An open circuit means the electrical path to the driver's airbag inflator is broken somewhere, which means the airbag will NOT deploy in a crash. This is a serious safety concern that should be addressed promptly.
The most common cause is a worn-out clock spring, also called a spiral cable or contact reel. This is a coiled flat cable inside the steering column that allows the electrical connections to the steering wheel (airbag, horn, cruise control) to remain intact as you turn the wheel. Over time and with many turns, this cable can break internally. You'll often notice that your horn and steering wheel buttons stop working at the same time as the airbag light comes on—this is a telltale sign of a bad clock spring.
While replacing a clock spring is mechanically straightforward, working around airbag components carries risk of accidental deployment, which can cause serious injury. It's strongly recommended to have this repair done by a qualified technician. The clock spring part itself costs $50–$200 depending on the vehicle, and professional installation typically runs $200–$700 total. Do not ignore this code—driving without a functional driver airbag significantly increases injury risk in a frontal collision.
Severity
Symptoms
- •Airbag warning light illuminated on dashboard
- •Horn may not function
- •Cruise control buttons on steering wheel may not work
- •No visible drivability issues but driver airbag is disabled
- •SRS warning message may appear on instrument cluster
- •Steering wheel controls may be intermittent
Likely Causes
The clock spring is a coiled ribbon cable that maintains electrical connection between the steering wheel and the column as you turn. It wears over time and can develop open circuits, breaking the connection to the driver airbag.
The electrical connector behind the steering wheel that plugs into the driver airbag can become loose from vibration or corroded from moisture, creating an open circuit condition.
Wiring between the clock spring and the airbag module can be pinched, chafed, or broken during steering wheel or column service work, resulting in an open circuit.
The airbag squib (igniter) inside the airbag module itself can develop an open circuit due to internal corrosion or manufacturing defects, though this is less common.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace the clock spring (spiral cable) assembly
- Inspect and reseat the driver airbag connector behind the steering wheel
- Repair or replace damaged wiring in the steering column
- Replace the driver airbag module if confirmed defective
- Clear the code and verify the airbag light turns off