I want to keep the side marker lights in the headlamp housing lit constantly, but I want them to flicker when I use my turn signal. Is this possible? Also if I split the harness to the middle marker lights to the lower lights (fogs) will that work fine? I have a '93

 

Yes, you can power your turning lights from the parking circuit with no problem. Their wattage is low enough that it won't cause a problem. I'm going to swap mine for real fogs when time allows. I have no need to illuminate the curbs as I drive.

To make the corner lights do what you want, you'll have to tap the middle marker's positive wire and run a new wire to the corner socket. You'll see that it has an unused hole in the bulb base -- you might have to remove a small rubber plug in the socket. Then just push enough wire through that the copper can contact the bulb where it needs to and you'll have it. The bulb is already dual-filament so it'll still blink like it's supposed to. Of course this is easiest to do with the bulb base removed from the headlight housing which is a PITA in the room available to work in.

To me it looks 100x better with the corner ambers illuminated. In stock form it just looks broken.