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Air Bag Clockspring Replacement
What is a Air Bag Clock Spring?
The airbag clock spring is a vital component in the Supplemental Restraint System (SRS), also known as the airbag system or passive restraint system. The airbag clock spring connects the driver's side airbag to the steering column and ensures that electrical contact is maintained between the airbag module and the vehicle electrical system while the steering wheel is being turned.
How does an Air Bag Clock Spring work?
The airbag clock spring is mounted to the end of the steering column directly behind the steering wheel. It contains a series of small wires wound in a spiral between two plates or discs. These wires rotate between the discs inside the clock spring when the steering wheel is turned from side to side. As the steering wheel turns, the coiled wires wrap freely in both directions. The wiring in the airbag clock spring connects the driver's airbag, the horn, and any other electric features built into the steering wheel - such as the radio or the cruise control buttons - to the vehicle's electrical system.
What are the symptoms of a bad Air Bag Clock Spring?
Problems with the airbag clock spring occur when the wires inside the clock spring become fatigued over time and break. This can cause an open circuit or a short circuit in one or more of the systems connected by the clock spring. The clock spring can also become damaged if the driver's airbag is deployed in a crash. The airbag (or SRS) warning light will usually come on when the clock spring is damaged. The horn, radio, cruise control, or any other component that is operated through the steering wheel may also stop working, or may work intermittently. Fuses may blow with a short circuit in the clock spring, and in some cases, electric arcing and smoke can come from the steering wheel.
Can I drive with a bad Air Bag Clock Spring?
Because the airbag and the horn are both vehicle safety components, and because they are connected through the steering wheel and airbag clock spring, a faulty clock spring should be replaced as soon as possible. A defective airbag clock spring will often defeat the Supplemental Restraint System, preventing the airbags from inflating in a crash.
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How often do Air Bag Clocksprings need replacement?
The airbag clock spring is designed to last the lifetime of the vehicle. On some older models, the wiring inside the clock spring can become brittle and break over time, causing failure. The clock spring may need to be replaced if it is damaged during careless service to the steering system, and, in some cases, if the vehicle is in a crash and the driver's airbag deploys.
How are Air Bag Clocksprings diagnosed?
A technician will use a scan tool to check the electrical system for signs of a faulty airbag clock spring. A test with a multimeter may also be done on the clock spring itself. A repair manual and wiring diagram are used to identify and test each circuit running through the clock spring.
How are Air Bag Clock Spring replaced?
To replace an airbag clock spring, a technician will first disconnect the battery to disarm the Supplemental Restraint System. The driver's airbag and the steering wheel are removed. In order to access the wiring harness connected to the airbag clock spring, the trim components on the steering column are removed. It may also be necessary to remove trim components from the lower dash assembly for access to the harness plugs. With the trim removed and the clock spring harness disconnected, the clock spring is removed and replaced. After the clock spring, steering wheel, trim, and airbag have been installed and connected, the Supplemental Restraint System will need to be reset with special software.
RepairPal Recommendations for Air Bag Clock Spring issues
If the airbag clock spring is damaged or defective, the Supplemental Restraint System is usually disarmed and the airbags will not inflate in the event of a vehicle crash. Furthermore, a short circuit in the clock spring can result in additional damage to the vehicle's electrical system or computer modules. If the airbag (SRS) warning light illuminates on the dashboard, or if any other symptoms of airbag clock spring failure appear (i.e. faulty radio controls on the steering wheel), RepairPal recommends having the vehicle evaluated and repairs completed by an experienced technician as soon as possible.
What to look out for when dealing with Air Bag Clock Spring issues
The airbag clock spring contains delicate wires that can be damaged during careless service to the steering and front suspension systems. Care must be exercised to ensure that the steering wheel is not allowed to free-spin with steering and suspension components disconnected. The battery should always be disconnected prior to performing any repairs on the Supplemental Restraint System, including the airbag clock spring. Care must be exercised whenever handling an airbag module. The SRS will also need to be reset once repairs have been completed.
Can I replace the Air Bag Clock Spring myself?
It is recommended that repairs to the Supplemental Restraint System be left to a professional. Accurate diagnosis of the system is essential. Depending on the reason for failure of the airbag clock spring, other components may also need to be replaced to ensure proper function of the Supplemental Restraint System. A professional technician will have access to the equipment to perform a thorough test of the system for any other failed components and replace them as necessary. A technician will also be able to reset the system with special software after the components have been replaced. Someone with advanced DIY experience may be able to perform part of the repair, but will still need assistance to reset the SRS.
Chevrolet Air Bag Clockspring Replacement Cost Estimates
The average cost for a Air Bag Clockspring Replacement is between $222 and $268 but can vary from car to car.