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2013 ATS 2.0T AWD
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487 Posts
Discussion Starter · #1 · (Edited)
Just happened. The driver-side lower daytime running LED doesn't brighten up like the passenger side. Any advice? It usually brightens up equal to the passenger side after driving for just a bit. Happens day or night. I looked in posting history and one guy thinks there may be a loose wire which is responsible for the dim vs. bright lower DRL.

2013 2.0T
Sport-performance/cold package.
Auto trans.
83,300 miles.

Maybe I'll post a photo if anyone thinks it might help.
 

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2014 ATS 2.0T 6spd manual Performance RWD
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1,233 Posts
Have you inspected the wiring, checked your grounds, etc? Might need to use a volt meter and see if the wires are carrying the correct voltage. I think there are three separate LED's in the lower housing and it seems unlikely to me that all three would go bad at the same time, must be something that controls all of them that's acting up.
 

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2013 ATS 2.0T AWD
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487 Posts
Discussion Starter · #3 ·
Me thinks it is most likely either the relay that controls the dimming bright and dim during start up, or, as you say the wiring. It started after a couple good snowfalls here in N. Central IL and so much salt being used on the roads. But here's the thing: Upon start-up in the dark garage, that driver side LED is dimmer than the passenger one. Then, when the car gets out into the daylight, it lightens up evenly. So it could also somehow be the light sensor? I've tried covering the dash-mounted light sensor to fool it into thinking it's dark. The only thing that changes is the instrument panel brightness so that seems to be working.
 

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2014 ATS 2.0T 6spd manual Performance RWD
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1,233 Posts
^That's interesting, didn't think about the light sensor. But wouldn't that send the same signal to both sides? Not sure, that's newfangled technology to me haha.

I freakin hate salt, wish my city would experiment with beat juice and other alternatives like some other states are doing. Even for a dusting of snow Ohio salts the crap out of the roads, simply ridiculous and not necessary. Only thing I can think of is they must be afraid people would sue or something if an accident occurred. Makes me sick, and my second car needs new hub bearings so I've had to drive my ATS this winter, usually it's stored away.
 
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