Maybe this is a "feature"? I have a Buick Electra 225 Custom convertible with 59k miles. None of the windows will work for the first few minutes of operation. After 2-5 minutes, boom. They work. If I turn off the car and then restart it, same thing. So, is this a failing relay or something? What needs fixin'? Thanks, Mark. P.S. Is there a 3rd lapbelt in the back of a 69' 225?