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Old 12-20-2020, 11:14 PM   #1
ragnaroc
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2015 WRX
Crystal White Pearl

Default 15 WRX auto headlights always on

I've noticed that my headlights are always on when in auto mode. They aren't the DRL lights and my guages and screens are also dimmed. I haven't been able to figure out whats going on. There's nothing blocking the sensor to make it think that its dark out.

Any help would be appreciated.
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Old 12-22-2020, 03:49 PM   #2
Cougar4
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Winestone

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Is the DRL circuit working properly? I assume that you are saying that the headlights are working at full normal brightness and not in the dimmed DRL mode.
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Old 12-22-2020, 04:14 PM   #3
Blktrax
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If you swapped stock halogens to aftermarket LED then thatís your problem. LEDs use way less power and do not operate with the same circuit load as stock bulbs. As most people are unaware and constantly blinding people with full power high beams as DRLís

If you still have stock bulbs , then the sensitivity may be set to the maximum setting turning on the headlights in pretty much any condition other than direct sunlight. Look at your owners manual how to adjust the sensitivity setting.
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Old 12-24-2020, 04:08 AM   #4
ragnaroc
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Crystal White Pearl

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Quote:
Originally Posted by Blktrax View Post
If you swapped stock halogens to aftermarket LED then thatís your problem. LEDs use way less power and do not operate with the same circuit load as stock bulbs. As most people are unaware and constantly blinding people with full power high beams as DRLís

If you still have stock bulbs , then the sensitivity may be set to the maximum setting turning on the headlights in pretty much any condition other than direct sunlight. Look at your owners manual how to adjust the sensitivity setting.

I already have the sensitivity down to low and from what I've read that just changes how quickly the go from off to on and vice versa. This was going on before the LED bulbs
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Old 12-24-2020, 04:09 AM   #5
ragnaroc
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2015 WRX
Crystal White Pearl

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Quote:
Originally Posted by Cougar4 View Post
Is the DRL circuit working properly? I assume that you are saying that the headlights are working at full normal brightness and not in the dimmed DRL mode.
No I mean my low beams/interior lights are acting like its dark out when its still bright enough for me to wear my sunglasses.
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Old 12-24-2020, 11:40 AM   #6
Blktrax
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That sounds like the sun sensor on the dash or the dimmer roll switch left the the steering wheel. If you turn it to the full bright setting the dot, then the dash lights should never dim. Have you replaced the radio? If seen wire issues when the illumination wire is hooked up incorrectly cause all kinds of dash light issues.
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Old 12-24-2020, 02:14 PM   #7
ragnaroc
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2015 WRX
Crystal White Pearl

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Quote:
Originally Posted by Blktrax View Post
That sounds like the sun sensor on the dash or the dimmer roll switch left the the steering wheel. If you turn it to the full bright setting the dot, then the dash lights should never dim. Have you replaced the radio? If seen wire issues when the illumination wire is hooked up incorrectly cause all kinds of dash light issues.
Still has the stock radio. I have the dash dimmer switch to where I like it for night driving, but my old BRZ wouldn't turn on the headlights until it actually got dark.
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Old 12-24-2020, 03:19 PM   #8
Blktrax
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Sounds like a failing light sensor on the dash. The black button looking thing right of the center display about the size of a quarter. Have seen dash cleaners get in there and ruin the chip. Part Number: 84088FJ001
https://parts.subaru.com/p/subaru_20...4088FJ001.html

But I've also seen LED headlight and marker bulbs cause crazy things with the Body Control Module, You may want to try swapping back any LED's to normal bulbs and see if the problem continues.

Last edited by Blktrax; 12-24-2020 at 03:24 PM.
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Old 12-24-2020, 04:04 PM   #9
ragnaroc
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2015 WRX
Crystal White Pearl

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Quote:
Originally Posted by Blktrax View Post
Sounds like a failing light sensor on the dash. The black button looking thing right of the center display about the size of a quarter. Have seen dash cleaners get in there and ruin the chip. Part Number: 84088FJ001
https://parts.subaru.com/p/subaru_20...4088FJ001.html

But I've also seen LED headlight and marker bulbs cause crazy things with the Body Control Module, You may want to try swapping back any LED's to normal bulbs and see if the problem continues.
That's kinda what I'm thinking and I've been checking out a manual on how to replace it.

This was happening with the standard halogen bulb that was in the car.
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