!999 Concorde Cruise Control Problem

[Simprof]

Hi I see from the forum that some others have had problems with the Cruise Control.
I had no problems with it at all it just stopped working. The Cruise light comes on and I have checked the Servo power plug, when I put the cruise on it also sends power to the servo on one of the four connectors. I removed the servo and the diaphram is fine. The wire to the Throttle body also is okay. The switches on the steering wheel seem okay but nothing happens when I hit the set buttom. How can I check the Servo plug without the car moving, also the brake switch seems to be working okay. I cannot locate a fuse for it other than the 10 Amp it uses.

Any ideas where I should be looking?

Thanks in Advance