I experimented with Jan's method of converting the side marker light to also work as a blinker. I thought it was a bad idea because it would change the load and therefore the flash rate of the blinker unit. I also thought it was a bad idea because the side marker light appeared to be in series and therefore grounded through one of the filaments of the bumper light which would cause both bulbs to light dimly. To find out for sure, I hooked up one side like Jan said using jumper wires from the outside so that I wouldn't modify my car. You know what? It worked! The modification does not alter the flash rate of the blinker. Also, I discovered that the green wire is grounded by the blinker mechanism when the light is off. That makes it a good ground and not a 'floating ground' through another bulb. When both the flasher and running lights are on in the front fascia, then both red and green wires are hot which produces no voltage across the side marker light. Does anyone have a suggestion on how to do a similar modification to the rear marker lights? The wiring diagram I have in my service manual is not reproduced very well. Walt Tampa, FL