Here is a good one. For the last year my wipers on my 68 Camaro would only work when I pressed the knob. They would move once then reset to home. I attempted to troubleshoot them a couple of times, but it wasn't too big of an issue since I don't drive it in the rain. Well, today I wanted to test drive it after doing some work, and it was raining. I pressed the knob, then pressed it again, and then again. Hey!! now my wipers work great in low and high. Only problem now, I can't shut them off. At least I know the motor works, I'll bet the switch is goofy.