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this can be complex, i would of liked it if you gave me more information. first off, if you have halogen bulbs i have not seen to many of those problems, i have however seen this problem with xenon headlights, the first most common problem is faulty xenon control module, there is a bulletin pertaining to this problem and if the module were made by AL, and within a certain production range, the modules and bulbs will need to be replaced, however you will have to get the bulletin somehow, i sudjest you take it to the dealer to get fixed, the other problem is the ahl module will go bad and cause the xenon bulbs to go on and off, they will go off, then cycle the key and they will come on, i found this to be the ahl module, (adaptive headlight module, for the movement of the headlights of left and right), also this module is small and is located behind the glovebox, remove the glove box and disconnect the one connector on the ahl module, test the lighting system, if it works thent the ahl module is the problem.

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2006-08-19 23:26:25
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Q: Why do your headlights go on and off?
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