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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by users over the course of many years.
If you have any questions, please feel free to email us.



Lincoln - Mercury
  Jim Grant's Tech Tips

'97 Chevy Venture, Air Bag Light

Q: I had the steering rack changed on my ‘97 Chevy Venture. I'm in the Navy, and now me and my Venture are in Spain. What happened is, when they changed the steering rack they didn't do it right and somehow triggered the airbag light. The airbag didn't go off, but the light came on. What I want to know is how do I reset the system so that the light will go off?

A: What you first need to know is why the air bag warning light is on. I suspect that the code reported will be for a component called a SIR coil. The SIR coil is often times called a clock spring. This component, which is located in the steering column, has several wraps of wire that look much like the spring in a clock. This assembly allows for one end to be connected to the wiring harness for the air bag system and the other end to be connected to the air bag in the steering wheel. The wraps of wire allow for the steering wheel to be turned to the left or right for obvious reasons. What often happens is when a steering rack is replaced the steering wheel is rotated one way or the other without the steering rack connected. The clock spring of wire can only go so many turns one way or the other before it breaks. When the wire is broken, on comes the air bag warning light. Whenever a steering rack is being replaced in an air bag equipped vehicle the steering wheel must be locked to prevent incorrect winding of the wire for the air bag.

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