Thanks for the reply. Things are OK now that it's 20 degrees F!!! I had pulled fuses earlier & swapped relays. I don't think the problem is there. The car has 120,000 miles, so, then, most likely, (wear & tear), and (temperature & humidity) - I'm cracking the windows a bit at night and I should put a heater inside the car to dry it out (hard to do in snow conditions). Since, it's an intermittent problem and I don't do much night driving (more daylight now). I will nurse and address better in spring/summer. I was considering, if things failed entirely, I'd have to take it to the shop, and a switch and a key replacement - more expense. I think the key must be 'mechincal' and pushes a pin to make a contact, but like you said, hard to say, which is the culprit, unless all taken apart. Cheers.