Understanding Clock Springs

A clock spring, also known as a spiral cable or airbag clock spring, is a crucial component in modern vehicles. It's responsible for maintaining electrical connections between the steering wheel and the vehicle's electrical system. This includes functions like the horn, airbag, and steering wheel controls.

Preparation for Rewinding

Before attempting to rewind a clock spring, ensure you have the necessary tools and a safe working environment. Disconnect the vehicle's battery and wait for at least 10-15 minutes to discharge any residual power in the system. This step is crucial for safety, especially when dealing with airbag systems.

Accessing the Clock Spring

To access the clock spring:

  • Remove the steering wheel airbag module
  • Detach the steering wheel
  • Remove the steering column covers

Mark the steering wheel's position relative to the steering column to ensure proper realignment during reassembly.

Rewinding Process

Step 1: Assess the Clock Spring

Carefully examine the clock spring for any visible damage. If the ribbon inside is torn or severely damaged, replacement might be necessary.

Step 2: Find the Center Position

To find the center position:

  • Rotate the clock spring fully in one direction until you feel resistance
  • Count the number of full rotations as you turn it back in the opposite direction until you reach the other end
  • Divide the total number of rotations by two
  • Turn the clock spring back that many rotations to reach the center position

Step 3: Secure the Clock Spring

Once centered, many clock springs have a locking mechanism or a pin to hold them in place. Engage this lock to prevent accidental movement during installation.

Reinstallation

When reinstalling the clock spring:

  • Ensure the front wheels are pointing straight ahead
  • Align the steering wheel to its original marked position
  • Carefully reconnect all electrical components
  • Reattach the steering wheel and airbag module

Important Considerations

  • Never force the clock spring to rotate beyond its natural limits
  • If unsure about the procedure, consult a professional mechanic
  • Some vehicles may require a steering angle sensor recalibration after clock spring replacement

Testing

After reinstallation, test all steering wheel functions, including the horn, airbag indicator light, and any steering wheel controls. If any issues persist, professional diagnosis may be necessary.

FAQs About Clock Spring Rewinding

    • Can I drive with a broken clock spring?
      It's not recommended as it can affect crucial safety features like the airbag system.
    • How often should a clock spring be replaced?
      Clock springs typically last the lifetime of the vehicle unless damaged.
    • Will my airbag light turn on if the clock spring is faulty?
      Yes, a faulty clock spring often triggers the airbag warning light.