I have a 90 Chey Corsica with an unusual problem. I hear a clicking noise like a bad flasher, and my headlights start blinking off and on. It's an intermittent problem, and I can't seem to find any reason for it.

Anybody got any ideas?

Yep, I know exactly what it is. You have a shorted headlamp. Some are on a thermal fuse and they trip and auto reset and trip again.

Freaked me out too on a dark road.

Look at the blinking at night from the front of the car and/or pull one connector at a time.