Interior Lights Flickering - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Skorov · 12-21-2014, 10:38 PM

Hi all,

Recently, I have noticed that my interior lights started flickering slightly when at idle. I have checked the battery and the alternator. Both seem to be outputting a good voltage.
Battery: 12.7V
Alternator: 14.2V

Seems like an alternator issue, but could it already have died after just 2 years? Maybe I got a dud...

Any advise on what else I should check or how to I can confirm that it is an alternator issue?

Thanks!

904FRSlow · 12-22-2014, 01:27 AM

If its LEDs then they are probably just dying. My driver side turn signals start flickering after driving around for more then 5 minutes so I need to replace the bulb

Skorov · 12-22-2014, 03:16 AM

Nope. It's all internal LEDs. Definitely something with the circuitry.

904FRSlow · 12-22-2014, 03:21 AM

Either way, interior lights are like $4 so if you can't find the problem, just buy new ones

Skorov · 12-22-2014, 04:31 PM

Quote:

Originally Posted by 904FRSlow

Either way, interior lights are like $4 so if you can't find the problem, just buy new ones

I'm talking about the backlight LEDs for the clock, HVAC and instrument cluster. I highly doubt ~20 LEDs are failing simultaneously.

Series.Ru · 12-25-2014, 09:36 PM

Have you checked your emf readings? Any local cattle mutilations?

FRSfan111 · 12-28-2014, 12:55 AM

My dome light and exterior lights do this when idling bellow 800rps :/ alternator is putting out over 14 volts and put a brand new battery in. Still the problem persists.

ZOMFGAARON · 05-07-2015, 11:04 PM

Bump anyone figure this out?
The lights don't flicker when my cars off but do once on.
It's happening my my dome / visor lights

Sent from my iPhone using Tapatalk

Euro7R · 05-07-2015, 11:34 PM

Quote:

Originally Posted by ZOMFGAARON

Bump anyone figure this out?
The lights don't flicker when my cars off but do once on.
It's happening my my dome / visor lights

Sent from my iPhone using Tapatalk

Is your lights stock or aftermarket leds? I've seen some aftermarket leds flicker due to bad quality and not related to the car itself.

Chimera · 05-07-2015, 11:34 PM

Flickering as a full shutoff flicker, or as in dimming intensity? I'm wondering if this could be a pwm issue with the bcu.

Either way sounds like a feature to me.. J/k however I am curious too as I have a few accessories hanging off the dome light circuit myself.

ZOMFGAARON · 05-08-2015, 10:47 AM

Its not so much a flicker as a pulse. Ill try to see if I can get it on video.

My dome is a cheaper led board but my visors have good bulbs in them and do the same. Any suggestions on where to buy the bulbs?

Sent from my iPhone using Tapatalk

continuecrushing · 05-08-2015, 11:12 AM

diode dynamic makes some decent ones

Dome Light

Inextirpable · 06-16-2015, 08:27 AM

Was there any update to this?

I have started to noticed that my interior lights, DRL's, and brake lights will flicker/pulse when the car is under 1,000 RPM. I took it into the dealership and they said that it was not the alternator, battery or any of the grounds. They were actually unable to find the problem but said it may be the ECU, however they are expecting me to pay for that so as of this I have decided to not go down that route just yet so I am wondering if anyone has any other ideas.

Burrcold · 02-23-2016, 05:56 PM

Anybody have any experience with this? I'm now getting the same thing. Dome light and factory DRL both flicker when under 1k rpm.

12-21-2014, 10:38 PM	#1
Skorov Senior Member Join Date: Mar 2012 Drives: 86 GTS White Location: Sydney, AU Posts: 603 Thanks: 103 Thanked 169 Times in 105 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Interior Lights Flickering Hi all, Recently, I have noticed that my interior lights started flickering slightly when at idle. I have checked the battery and the alternator. Both seem to be outputting a good voltage. Battery: 12.7V Alternator: 14.2V Seems like an alternator issue, but could it already have died after just 2 years? Maybe I got a dud... Any advise on what else I should check or how to I can confirm that it is an alternator issue? Thanks!

12-28-2014, 12:55 AM	#7
FRSfan111 Sideways and smiling! Join Date: Jan 2012 Drives: First 86 FRS 5/8/2012 (second US) Location: Oregon Posts: 941 Thanks: 17 Thanked 273 Times in 179 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	My dome light and exterior lights do this when idling bellow 800rps :/ alternator is putting out over 14 volts and put a brand new battery in. Still the problem persists. __________________ My build http://www.ft86club.com/forums/showt...08#post1283608

05-07-2015, 11:04 PM	#8
ZOMFGAARON A Demon Join Date: Dec 2013 Drives: Raven GT86 Location: Denver Posts: 1,992 Thanks: 190 Thanked 1,321 Times in 701 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	Interior Lights Flickering Bump anyone figure this out? The lights don't flicker when my cars off but do once on. It's happening my my dome / visor lights Sent from my iPhone using Tapatalk

05-07-2015, 11:34 PM	#10
Chimera Senior Member Join Date: Dec 2013 Drives: FRS Location: Atlanta Posts: 1,181 Thanks: 575 Thanked 291 Times in 216 Posts Mentioned: 17 Post(s) Tagged: 1 Thread(s)	Flickering as a full shutoff flicker, or as in dimming intensity? I'm wondering if this could be a pwm issue with the bcu. Either way sounds like a feature to me.. J/k however I am curious too as I have a few accessories hanging off the dome light circuit myself. __________________ Car Journal: http://www.ft86club.com/forums/showthread.php?p=1513783

06-16-2015, 08:27 AM	#13
Inextirpable Awesome Join Date: Oct 2012 Drives: World Rally Blue Subaru BRZ Location: Mississauga Posts: 140 Thanks: 136 Thanked 93 Times in 49 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Was there any update to this? I have started to noticed that my interior lights, DRL's, and brake lights will flicker/pulse when the car is under 1,000 RPM. I took it into the dealership and they said that it was not the alternator, battery or any of the grounds. They were actually unable to find the problem but said it may be the ECU, however they are expecting me to pay for that so as of this I have decided to not go down that route just yet so I am wondering if anyone has any other ideas. __________________ Instagram

12-22-2014, 01:27 AM	#2
904FRSlow Senior Member Join Date: May 2014 Drives: '13 FR-S Whiteout Location: Saint Augustine Posts: 304 Thanks: 39 Thanked 88 Times in 59 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	If its LEDs then they are probably just dying. My driver side turn signals start flickering after driving around for more then 5 minutes so I need to replace the bulb

12-22-2014, 03:16 AM	#3
Skorov Senior Member Join Date: Mar 2012 Drives: 86 GTS White Location: Sydney, AU Posts: 603 Thanks: 103 Thanked 169 Times in 105 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Nope. It's all internal LEDs. Definitely something with the circuitry.

12-22-2014, 03:21 AM	#4
904FRSlow Senior Member Join Date: May 2014 Drives: '13 FR-S Whiteout Location: Saint Augustine Posts: 304 Thanks: 39 Thanked 88 Times in 59 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	Either way, interior lights are like $4 so if you can't find the problem, just buy new ones

12-25-2014, 09:36 PM	#6
Series.Ru Junior Member Join Date: Aug 2014 Drives: '15 Series.Blue Location: Philly PA Posts: 5 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Have you checked your emf readings? Any local cattle mutilations?

05-08-2015, 10:47 AM	#11
ZOMFGAARON A Demon Join Date: Dec 2013 Drives: Raven GT86 Location: Denver Posts: 1,992 Thanks: 190 Thanked 1,321 Times in 701 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	Its not so much a flicker as a pulse. Ill try to see if I can get it on video. My dome is a cheaper led board but my visors have good bulbs in them and do the same. Any suggestions on where to buy the bulbs? Sent from my iPhone using Tapatalk

05-08-2015, 11:12 AM	#12
continuecrushing Join Date: Mar 2013 Drives: 2013 Firestorm FRS Location: Lake Elsinore, CA Posts: 2,707 Thanks: 1,231 Thanked 2,144 Times in 1,003 Posts Mentioned: 73 Post(s) Tagged: 2 Thread(s)	diode dynamic makes some decent ones Dome Light

02-23-2016, 05:56 PM	#14
Burrcold Senior Member Join Date: Jul 2010 Drives: Subaru BRZ Limited Location: Toronto, Canada Posts: 2,624 Thanks: 763 Thanked 1,586 Times in 776 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Anybody have any experience with this? I'm now getting the same thing. Dome light and factory DRL both flicker when under 1k rpm. __________________

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