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My 2001 chevy s10 blazer cruise control worked intermittenly. When it was warking I would hear a click under dash behind instument panel and it would set speed. Now it wont work at all and I dont hear click.Is there a relay switch under dash? And what and where are the other components to the cruise system?

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I don't know what you would have heard "clicking" under the dash when you set your cruise control unless you have an aftermarket cruise control or something.

Assuming you have factory cruise, there are no relays located under the dash for this system. The most common causes of cruise control malfunctions are the Vehicle Speed sensor, the Multifunction Switch (Turn Signal/Cruise Control switch) and possibly a malfunctioning brake switch. The cruise control module under the hood works off of an electric "stepper motor" to pull a cable and open your throttle. The entire system is controlled by the Engine Control Module. (ECM) The switches and the module can all be checked for proper operation using a scan tool to access the computer data. If the "Check Engine" or "Service Engine Soon" light is on, this needs to be addressed first. It could also be disabled due to an Antilock Brake System (ABS) malfunction, so this also needs to be checked.

Please also review this article: What Else Could Be Wrong?

Posted on Apr 10, 2011

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