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JK Electrical, Lighting & Sound SystemsBulletin board forum regarding topics such as stereo head units, CD players, MP3 players, speaker systems, amplifiers, hardmounted GPS devices, computers, headlight upgrades, fog lights, off-road lights, general wiring and anti-theft devices.
I don't have any JK schematics but it is possible that the factory used a floating ground between the hazards and blinkers. If they did, try reversing the LED wires.