Cruise not working on 2000 century

I have researched on this forum to try to find a starting point.5 yrs ago, the driver said the cruise stopped working when TA replaced the in dash valve(yellow and red ).I have started checking everything to playing with the brake pedal to replacing the transmission speed sensor.The only thing I havnt done is checking the continuity on the clutch pedal switch.The air switches under the dash seems right.Anymore dieas for me to check?The cruise switch light is on as usual.Any ideas on trouble shooting?Where is the grown wire?

 

Yes, my high idle and jakes work as they should.What fixed your problem?

 

Good point about checking the brake valve area.You mean the top dash and not the bottom where all the air switches are located?

 

Thx .Will check tomorrow