Anybody else have their cruise control cut out intermittently? I was driving down the highway, got up to speed, turned on the cruise control and it immediately turned itself off. For nearly an hour afterward, I'd push the button, and nothing. No light, no speed consistency. After a time, I'd push the button and it would stay on. Any ideas or suggestions on how to deal with this? We do quite a bit of highway driving and we find cruise to be important.