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Questing for those with retrofitted bi-xenons

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    #1

    Questing for those with retrofitted bi-xenons

    Need to do a deep dive on my headlights as I failed state inspection due to drivers side high beam not working. I rarely drive the car at night and can't ever remember the last time I used the high beams. I do know the car (March 2003 build) came stock with halogens and auto headlights and the previous owner retrofitted bi-xenons.

    Question for those who have a similar setup is how did you do your wiring. I've seen old DIYs taking 12V+ from pin 2 or 36 or 2 and 36 on the LCM either with or without a relay.

    I need to check all the wiring, coding, etc. Shop advised flash to pass (inner halogens) are both working. Pushing forward on the stalk for high beams, only the passenger inner halogen comes on. Don't believe the xenons are changing so I'm guessing the PO didn't wire anything and just re-coded.
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    #2
    It's been 3+ years since I retrofitted mine, so memory fades, but I ran a separate shutter trigger wire for each side from the LCM to the ballast (no relay) probably from pins 2 and 36 as you mentioned. I basically duplicated the way the factory harness would have been had it been there originally, plus an additional pair on each side for the city lights. All tied directly back to the LCM, including the leveling circuitry. I have a European LCM for halogens, so it has the manual height adjust wheel and no input circuit for the ride-height sensors, which was fine by me.

    All the rest was done in coding. I have it set to where both the xenon shutters open and the halogen highs operate in high-beam. Had to region-code it for Europe to get the city lights and park lamps/signals to work the way I wanted though.

    Sent from my SM-G988U using Tapatalk

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      #3
      Great info, thanks

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        #4
        Ran ISTA and it indeed found open circuit on the high beam wire. Pulled the light switch out and found the wiring already modded with the high beam wire pin pulled out of the connector. Popped it back in, secured with a zip tie and all good.



        Sent from my SM-G950U using Tapatalk

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