Cuise control problem

aki_sc91

Registered User
I would be very greatful of any kind of schematic and tips about the CC-system.
I'm mailing from Finland and i haven't been able to locate any repairshop which could help me.
(in Finland are not so many SC's i think)
My car is -91 5 speed SC and my cruise control first worked sometimes but not very often and now it doesn´t work at all.

The Haynes manual doesn't give much help on this. I think the problem is in the speed control servo unit ( modulating valve ?)
I have one electrical diagram in which there are three wires to this servo unit but in my car there is five!
Can i replace the modulating valve or is it the hole unit?
I havent yet detached the unit.
Any ideas what i should check...

thanking in advance
Aki
 
Cruise Control

Hey aki_sc91 sorry i don't have any diagram that i could post, but i do have an idea. Have you checked all the vaccuum lines ??? and check the unit itself, you will find it on the driverside fender front part close to the bumer..
 
check the vacuum dump valve...its a cylindrical valve attached to your brake pedal. The thing gets stuck. You can use ones from different cars... i think taurus also comes to mind...so get one from a junk yard. Thats what I did, and the cruise control works just fine
 
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