04-05-2020, 07:51 PM | #1 |
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Headlights wont turn off when using switch
Kind of confused here, tried searching but cant seem to find anyone with the same issue. They're all related to auto mode.
2017 340i RWD, adaptive LED headlights Anyways, I always use the switch for my headlights / DRLs and never use the auto mode. For some reason, even in the off position, my headlights and tail lights are on now. The switch doesn't do anything anymore no matter what position it's in. I checked all the fuses and all seem to be good. Is there a relay somewhere that could be bad? Anyone have any other suggestions or know what the problem may be?
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04-05-2020, 08:00 PM | #2 |
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Did the switch go bad? Pull the switch out and look at the insides. Maybe it's worn and stuck in the auto position?
Dang it, I left my old switch at work when I replaced mine with a EU spec one. Can't show you pics Basically take it out from the dash, disconnect the harness and pull the knob off and see if the knob connection is worn |
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04-06-2020, 06:42 AM | #3 | |
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04-06-2020, 08:33 AM | #5 |
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Is there a way to self diagnose that or scan it?
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04-06-2020, 10:13 AM | #7 |
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Haven't tried that yet. I'll give it a try later today
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04-06-2020, 10:17 AM | #8 |
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Probably, there isn't much that can happen that the car won't diagnose. IMO at the very least every BMW owner should have a OBD bluetooth adaptor and a diagnostic app. It will pay for itself the first time it avoids a trip to the dealer.
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04-06-2020, 11:04 AM | #9 | |
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04-06-2020, 11:23 AM | #10 |
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Before you go off on anything involved, try pulling the battery cables for 10 minutes (power cycle/reset every module). Or you could recode the FEM with bimmercode as that will reset it as well. Sounds like a glitch vs an actual problem, just my .02
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04-06-2020, 12:06 PM | #11 | |
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I have a Bimmergeeks cable already as well
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04-06-2020, 02:26 PM | #12 |
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I don't have an app, for diagnosis and repair I use a Foxwell NT510, so I can't recommend an app from personal experience. There are plenty of them in Google apps, many are no charge but those are limited in what they can do. If you're going to get an adapter you might as well get one that works with Bimmercode. For that I have a Veepeak OBDCheck BLE. I got mine with a coupon through Bimmercode.
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04-06-2020, 03:38 PM | #13 | |
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04-06-2020, 03:40 PM | #14 |
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As for the light issue.
I unplugged the switch, hit the ignition on. Lights still turned on. Left the ignition on, plugged the switch back in. Lights turned off. Seems to be working as normal again. Strange, hopefully this helps someone else out at some point.
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11-26-2021, 07:05 PM | #15 |
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Turnoff the daytime running lamps in setting amd it will make your lights go off when you put it in the off position.
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