99-00 Sidemarkers?

Im really thinking about drilling some holes in my fenders and installing amber sidemarkers. I think i can figure out the blinker circuit from the corner lights, from when i had some (peep)led mirrors. Anyway I had them tapped in from the wires from the corner lights. However they always stayed on, meaning i may have had the parking wire instead of the blinking wire maybe? Im gonna go back and test the other wire before i really decide.

Any help or advice?
 
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