I know exactly how to do it. It doesn't require adding any new wires through the forward firewall. Rather, it communicates to the front end wiring via the existing wires. It requires adding a little unit in the LH headlight bucket area, and another tiny unit inside the car, under the dash.
The setup is activated by grounding a terminal on the underdash unit. You can install a button, of course, or you could wire up a remote control that grounds the terminal (or however you want ).
Anyway, when you actuate it, the LH headlamp opens and the headlight flashes ("winks"). When you release the button (or remote), the headlamp quits "winking" and closes.
If the headlights are already turned on and you actuate the thing, the LH headlight flashes its "bright" (high beam). Of course, the headlights behave just like stock otherwise.
I've had the "winky light" installed on two of my Fieros for years. It's dirt-simple and it's more "clever" than high-tech. It seems to be reliable. Since it uses the existing headlight units, the response isn't any faster than the basline headights - so flashing the lamp was how the "winking" effect was created. If you're interested, you might PM me.
Was approached by a fellow on this Forum about going into business selling them, but didn't want to do it that way.
[Edited - added the
blue part, which I had forgotten all about

[This message has been edited by StuGood (edited 08-03-2006).]