Question about 1997 GMC Jimmy
It sound like a wheel sensor. Down under the brakes on all four tires there should be a wire that goes in by the hub. This is a magnetic sensor that reads a gear connected to the rotating assembly of the hub. It counts the teeth on the gear as they go by and turns this information into something your on board computer can read. If it thinks one tire is spinning faster than the other, it believes you are losing traction and activates traction control if you have it. It also works when braking. If you go form 30 mph to 0 instantly, it know that the tires are locked up and you are sliding. If there is no read from this sensor, it triggers the abs light. Please check this sensor and the wiring to it.
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
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