Question about 1999 Volvo S80

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Cruise control doesn't engage 1999 volvo s80 t6

The cruise light comes on on the dash but when I try to set the speed it doesn't engage. I don't think it is the brake pedal; my abs and stc warning lights are on due to a broken exciter ring on the front left hub (not sure whether the abs module is okay as these warning lights were on when I bought the car). Is there a common problem with these cruise units? Any ideas as to the most likely cause? I appreciate your thoughts!

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  • kirkdewar Dec 27, 2008

    Thanks for your reply. I am going to get my speed sensor ring replaced shortly, and if this cures the abs and stc I'll know if the cruise control works. Thanks again

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According the the owners manual (I have the same car, and the same problem), the cruise control will disengage automatically if wheel slip is sensed. This makes me think that if the ABS isn't working properly, Cruise control and STC will not function either, since it's the ABS's function to detect wheel slip.

Posted on Nov 08, 2012

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Not a volvo mechanic but on most american cars the abs and stc modules are in direct corilation with the cruise even though the cruise is most likely ran from vacume the disengagement is electrical.

Posted on Dec 27, 2008

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