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Discussion Starter #1
Hi, I need some help.

The black-and-white wires going to one of my headlights don't appear to make contact with ground, but some wires in the same plug do. Does anyone know what could possibly be wrong and/or how to fix this?

Background:
I just bought an IS 250 (2010 SE-I) and the right (driver side in UK) headlight low beam and high-beam don't work (previous owner said it was a bulb issue, but he lied). The turn signal and parking lights work normally, but the turn signal begins to flicker very quickly if I turn on the low-beam (or with the high-beam). The bulbs are not the issue and the lights generally seem to work if I bypass the ground wire and hook them directly to the frame. I unhooked the plug and noticed the black-and-white ground connection wires on the female side (ie car-side) are not actually connected to the ground like they are on the passenger-side headlight, but all other wires seem to be working (including 12V and some non-black-and-white ground wires).

The car had previously been in a light crash (again lied to by previous owner), but on the other side - and there are no issues there currently.

What I would like to know is where the black-and-white wires go from the headlight plug since they don't appear to go directly to the ground attachment on the wheel arch. In fact both the ground wires from the plug and from the wheel arch attachment appear to go inside the cable housing leading towards the inside of the car.

Any help would be much appreciated!
 

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Discussion Starter #2
I fixed it! Surprisingly, it seems the ground wire actually goes to the other side of the car, and is attached to the frame there, not locally. I'm not sure why it does that, but I fixed it now (it had detached due to the accident).
 

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