E70 4.8 headlight issue
 

My driver side headlight does not work.. the Halo's, solid amber and indicators work but the light and high beam does not work.

Today I swapped my bulb from the passenger side headlight which works perfectly and it didn't work. I put the bulb from the not working drivers side into the passenger side and it worked... SO both bulbs are fine.

Why am I getting all lights except headlights on the drivers side?

If you have hid, it maybe the ballast under the headlight assembly.

^ This. Happened to me as well. Purchased a ballast online and having it installed this weekend.

Hey did the new ballast sort out your problems?


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Yes! Everything is back in working order.

Thats good!
I put the good ballast in the bad headlight and it still didnt work... there is alittle corrosion on the bad ballast and plug, maybe the cable has corrosion on it?

Ok so I swapped my good ballast and the ‘good’ cable to the bad headlight and still got nothing! The bad ballast doesn’t work on the good headlight so that’s been ordered...

The bulbs work. I put both bulbs in the good headlight assembly and they work.

My question is why does the bad headlight not work when I got a good ballast, good cable and good bulb in it?

Any ideas would be appreciated... thanks


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This maybe the start of continuity check of the wiring. Time to dust off the multimeter. You might need wiring diagram also to help.

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Oh no... I don’t really know how to use them very well or more importantly, what it all means haha


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Start with something simple then. Connector to the headlight assembly/housing. Compare with the other side with the switch on. If you get same result on both sides. Then your assembly maybe out. If you get different result on the connector. Then things get more interesting.

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Or easier way maybe is to put all the good stuff on the bad housing. And connect to the good side. This should eliminate the assembly whether it's bad or good.

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Ok thanks. I played alittle last night with the little white connector into the ballast and the housing plug. There wasn’t any discrepancies so.. yea


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I guess things do get interesting. Maybe before starting the wiring hunt. It's worth to check the fuse. I'm not familiar with headlamp fuse at the moment. Whether they have separate fuses for each side or not. But definitely worth to check first.

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Oh yea. That’s a good idea. Can anyone point me in the right direction of the headlight fuses? I have the headlight lenses off because i got new ones and I’m ready to put them all together but I have a feeling it’s way easier to diagnose without the lense so I can get to both sides.


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One would be under the glove box and the other one on the back/boot/trunk. Opposite to the first aid kit.

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Ok I’ll have a look after work! Thank you Mkurn


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Hi guys, does anyone have a wiring diagram for the hid headlights?


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Would anyone be kind enough to post a picture of both fuse boxes so I can compare.


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bump

Check out this website, they might have what you are looking for.

https://www.newtis.info/tisv2/a/en/

Ive had a similar experience. One side did not work, even with a "new" ballast. Turns out it was a simple mistake on my end, i forgot to plug everything back in.

Thanks man. that website is a great help! however I wish my problem was as easy as yours...