In my early morning stupor I forgot to mention the culprit of what I was addressing: the plastic plug on the clutch pedal can deteriorate or break, meaning the switch is no longer being pushed in by the clutch pedal. There is also such a plastic plug on the brake pedal, which makes the brake lights go off and allows the cruise control to work. I think BoostedRacerDad was just saying this in his post...

The CC had stopped working on my Sol a while ago. Funny enough the brake pedal plug broke sometime after, and that was how I found out why CC stopped working. The problem was the plastic plug I mentioned... you can ghetto fix it by taping a coin to the pedal plate where the plug goes, or get a nut & bolt and adjust it to push in that switch.