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Old 11-09-2020, 03:43 PM   #1
Wil
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GT86: headlight low beam flickering

Hello everyone,

I need a bit of help.
My passenger side headlight (LED Toyota GT86 headlight) is flickering on low beam setting, from time to time. The high beam and the LED are fine.

The xenon bulbs seem to have the same intensity and color which makes me think the bulb could still be alright. But I'll try swapping them.

The ceiling bulb in the interior is flickering/buzzing strangely as well when I'm powering off the car. It always buzzes when fading off when stepping out of the vehicle (typical diming light sound), this is normal but here it flickers and buzzes even before which makes me think it could be a problem of fuse or something... or bad electrical connection.

Things I'll try as soon as I have time:
- swapping bulbs
- replacing the ceiling light bulb

Do you have any idea of what it could be?
I tapped a couple of times on the bumper near the headlight during the past months to replace the bumper as it sometimes pop off a little. Maybe it fucked something up somehow but it doesn't explain the ceiling bulb that acts strangely as well (the car is a 2012MY so maybe it's time for that bulb to go to bulbs paradise).

Thank you for your help in advance.
Wil

Last edited by Wil; 11-10-2020 at 08:40 AM.
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Old 11-09-2020, 05:21 PM   #2
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I'm also interested on hearing opinions on this. My interior light flickers as well (2013 GT86) but that could also be because it's got an LED in there that was put in by the previous owner (might be a crappy one). I have also noticed my driver's side low beam flickering once when the ignition was on. Also got one led on the DRL strip on the passenger side headlight that seems burnt.
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Old 11-09-2020, 07:33 PM   #3
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Originally Posted by Sniepster View Post
I'm also interested on hearing opinions on this. My interior light flickers as well (2013 GT86) but that could also be because it's got an LED in there that was put in by the previous owner (might be a crappy one). I have also noticed my driver's side low beam flickering once when the ignition was on. Also got one led on the DRL strip on the passenger side headlight that seems burnt.

So for led interior light,I got the same situation going. From what I can tell, the led itself is burning out. Every time I use em, they donít end up lasting a long time.


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Old 11-10-2020, 12:05 AM   #4
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I had the same problem with my dome light, being dim, flickering, and buzzing.


It turned out the metal arms that held the bulb were not holding the bulb tight enough. I removed the bulb, bent them a bit more toward each other, and put it back. It's now a lot quieter when dimming, and is much brighter with no flickering the rest of the time.



Edit: I'm not 100% the dimming buzz went away, but it is definitely quieter than it was. This was with the OEM incandescent bulb.

Last edited by ng-86; 11-10-2020 at 12:22 AM.
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Old 11-10-2020, 07:13 AM   #5
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A lot of people these days seems to think they have electrical issues when they in fact just have junk LEDs. If your interior light is behaving badly and is NOT an incandescent bulb, before your start searching for issues, replace what's in there with what should be in there.

As for the headlight... You mentioned a HID bulb, a low beam, a high beam and an LED... On a 2012 car... So I'm going to guess you've got some junk retrofit HIDs, which are always notorious for dropping dead at the drop of a hat. Start diagnostic by returning the system to stock.
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Old 11-10-2020, 08:19 AM   #6
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A lot of people these days seems to think they have electrical issues when they in fact just have junk LEDs. If your interior light is behaving badly and is NOT an incandescent bulb, before your start searching for issues, replace what's in there with what should be in there.

As for the headlight... You mentioned a HID bulb, a low beam, a high beam and an LED... On a 2012 car... So I'm going to guess you've got some junk retrofit HIDs, which are always notorious for dropping dead at the drop of a hat. Start diagnostic by returning the system to stock.
All of the early models had HID's with LED daytime running lights from the factory
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Old 11-10-2020, 08:38 AM   #7
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Quote:
Originally Posted by RZNT4R View Post
A lot of people these days seems to think they have electrical issues when they in fact just have junk LEDs. If your interior light is behaving badly and is NOT an incandescent bulb, before your start searching for issues, replace what's in there with what should be in there.

As for the headlight... You mentioned a HID bulb, a low beam, a high beam and an LED... On a 2012 car... So I'm going to guess you've got some junk retrofit HIDs, which are always notorious for dropping dead at the drop of a hat. Start diagnostic by returning the system to stock.
Thank you for your inputs.
The system is indeed stock.
Toyota GT86 came with LED Xenon headlights from the factory here in Belgium.
We don't have the cheap headlight version like the FRS has.

This is the headlight I'm talking about:
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Old 11-14-2020, 12:59 AM   #8
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Ah I see. Your mention of low beams flickering and not "headlights" or "projectors" made me think you had the other headlamps, as the low beams and high beams are the same in this one.

In this case, swapping the bulbs side to side as was mentioned can find a bad/dying bulb. But it could be the igniter or ballast, those can be swapped side to side too, but it's generally way harder. But you say the high beam is fine? Low beam is just a shutter that flips in front of the high beam. It's hard to imagine the light being fine one way and not the other, does the flickering look like a loose shutter?
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Old 11-17-2020, 04:16 AM   #9
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I just wanted to let the OP know from the research i've been doing the HID flickering seems to come from the battery dying out. Will be testing this theory as my HID seems to flicker whenever i don't give the car enough gas from a standstill and it starts to stutter.
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Old 11-21-2020, 08:24 AM   #10
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Hi,
Thank you for your answers.
I bought two new D4S 35W 4300k bulbs as the original one were 8 years old.
While there is now a bit less flickering, it now went to the passenger side!
Maybe the new bulb is defective. I'll try swapping the two new bulbs.

But since the cabin light sometimes flickers as well, I though it could be a more general electrical problem (battery is less than 3 years old but maybe connectors are loose or dirty).

I think I was wrong when I said that high beam were not concerned.

It happens sporadically at idle as well as when driving.
I don't get it.
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Old 11-22-2020, 05:24 AM   #11
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Someone suggested to me that the ballast might be at fault. As my left HID flickers mostly when the engine is off and the lights are on
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