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The slide switch for cruise off/on has gotten pushed left to the off position.
The clutch switch is out of adjustment or shorted that disengages the cruise when you depress the clutch.
The brake switch is out of adjustment that disengages the cruise when you touch the brake.
Fuse 20 in the passenger foot well.
Speed sensor problem.
Contacts in cruise switch in multi stalk.
Maybe others, but these come to mind.
The cruise control on my 97 mn6 stopped working. just plain doesnt work. Any ideas where I could start diagnosing?
Mine stopped working one day also. I checked fuse, clutchetc working my way to the cluster switch but couldn't find anything wrong after a couple of hours of hunting. Took it for a test drive and damned if the thing wasn't working flawlessly.
That was 3 or 4 years ago and it still works fine. I don't know what I did to fix it but there must have been a bad electrical contact somewhere that was eliminated when I began poking around under the dash.
Good luck. Let us know how your troubleshooting goes.