Question about 1999 Volvo S80

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Cruise control won't engage

I have a 1999 volvo s 80 t6. My cruise control button will turn on the system ( "Cruise" lights up on the dash) but when I push the button to engage nothing happens. I know it could just be the brake pedal switch but I have lifted on the pedal with no result. I am wondering if my abs problem is related (I have removed the exciter ring on the front left hub as it was broken-- also possible that the abs module isn't working properly (I bought the car with the abs light already on)). Are there any typical weaknesses with this cruise control system I should focus on.
Thankyou

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  • kirkdewar Jan 02, 2009

    Thanks for your input. I never would have thought of something like that. I will let my mechanic know.

    Much appreciated!

  • braytonmark Jan 24, 2009

    I have a 2000 S80 Volvo the cruise will activate, but then it will deactivate without my input at highway speeds. When this occures I have to deactivate the cruise then reactivate it, it normally takes several tries setting the speed switch to get the cruise to engage. There are time when the cruise does engage when the RPM will rise then drop down again this does not cause an increase in the cars speed. My mechanic is guessing that there a vaccum leak in the cruise brake deactivation switch. I really need a reliable cruise help,

  • john adams Feb 02, 2013

    thank you volxpert and dennis weid but this is not the problem either . john adams.

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Most likely the clock spring is not the problem because when u push the button the dash light cruise comes on.wich means that you do not have an open circuit.with a light tester check to see if you are getting power to the cruise control servo.if you are then replace it.if no power you will need a new cruise control stick on the steering column.

Posted on Jan 08, 2009

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There is one weakness, the rotating clock spring contact that connects the airbag and other controls from the steering wheel to the steering column harness, it may have an open, if u have a wiring harness diagram you can test the switch a the column connector to see if it sends the cruise signal to engage, if not then the switch or rotating contact are defective in most cases.

Posted on Jan 02, 2009

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