gtatum1 Posted December 16, 2021 Share Posted December 16, 2021 My daughter’s 2009 IS250 came with factory HIDs with adaptive front lighting system; however, the previous owner took apart the headlight housings and installed aftermarket lighting, heated the housings to reseal, and installed a ballast system that was made for a different vehicle. The previously installed ballasts were HID using D3S bulbs for 2012 -2015 Tesla Model S. I am wanting to replace the headlight housings with regular LEDs since her left low beam has went out, but I do not know if the wiring harness will need to be changed. I do not care about the adaptive afs, but I need recommendations on what I need to do in order to replace both housings and plug into my existing harness. See photos below of ballasts currently used. Please help… Quote Link to comment Share on other sites More sharing options...
bazzle Posted December 25, 2021 Share Posted December 25, 2021 But the leds use a normal 12v switched source. You will need to check the the power into the HID ballast. Maybe a check on the pins of the plugs from the loom with a voltmeter will give a clue as to if you can feed a relay from there to switch the leds on. Quote Link to comment Share on other sites More sharing options...
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