cruise / brake issue - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-11-2004, 05:39 PM   #1
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Default cruise / brake issue

This is once again pertaining to my on again off again non functionig cruise control. It has been working as often as not of late, until I have to tap the brakes to shut it off. Then it seems to stop working for a while. So my question is where and how do I test the brake switch on the cruise to see if that is what is causing the problem? When I first got the car 3 1/2 years ago the cruise was inactive for a while due to a short in the brakes somewhere. This time it is intermittent. Any Help will be appreciated.
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Old 07-11-2004, 07:46 PM   #2
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Wheel speed sensor maybe man..
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Old 07-12-2004, 12:11 AM   #3
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To answer your question, test the violet wire coming off of the brake switch for +12 volts when the brake is NOT depressed. This switch is an input to the PCM for cruise control and opens whenever the brake pedal is depressed.
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