This seems to be a pretty logical mod – and as mentioned over at the jk-forum, one that should have been done at the factory. In North America, the side markers are basically running lights.  This mod makes them blink with the turn signal.  Oddly enough, it turns out that JK Wranglers sold in Italy, already do this.  After doing a google search for “marker light mod”, it turns out that this isn’t limited to just Jeep products at least ;^)

jk-forum: Marker light mod thread

Daniel Stern Lighting tech article

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