the cruise control in my 87 gta suddenly quit working it was working then i parked the car and got in it about an hour later and no cruise i checked the vacume hoses no leaks its got to be something electrical, and i don't have any codes so i don't think it is the speed sensor help!!!!!!!!

 

theres got to be somebody who can help

 

There are there coils inside of the servo. Two control the vacuum, and one physically PULLS the servo. Open up the back cover, fine the appropriat leads , and ohm them out to make sure there is no break in the coil. Also, remove and oil the vacuum valves and o rings.

PS.

With the car running, you should be able to use a 12 volt battery or car charger to activate the coils and make sure the servo works. You need the car running so that there is a supply of vacuum.

 

when i check that if everything is ok do you think it is the multi function switch is bad

 

It's worth a check. AFAIK the control box is solid state.... I would focus on the pieces with moving parts first.

 

Did you check the vacuum switch on the brake/clutch pedal? If it is cracked so the vacuum vents it will disable the curise. Opening the vacuum switch tells the curise control that you are braking and/or pushing in the clutch which disables the cruise control.

Dave

 

yea i believe i ve narrowed it down to the switch but i just want to thank everone for their input im gonna try the tech artical on how to bypass the oe switch and make your own using two momintary switches and a toggle switch thanks again

 

any updates?

 

Yea it was the switch on the column i just made my own switch with the instructions i found here on the forums and mounted it on the dash and its been working for a while now ill see if i can get some pictures up