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Go Back   E46Fanatics > Tuning & Tech > Lighting Forum

Lighting Forum
Angel Eyes, DDEs, lighted rings, Clear Turn Signals, LEDs, Xenon, HID, or Bi-Xenon. If it lights up and you want to discuss it, post here!

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Old 10-17-2012, 10:24 AM   #1
ChrisRedmon
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Side marker LED stays on.....Da fuq?

Bought some LED's for my side markers. Good great WONDERFUL.

However when i turn my car off....they stay lit. Why is this. I have a few load resistors...just not trying to tap anything if it wont fix it... Ideas?
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Old 10-19-2012, 11:34 PM   #2
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I'm having the same problem with my license plate leds. They stay on but if I put the bulbs back in it shuts off properly. Maybe it's coming from the capacitor? Any solution yet.
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Old 10-20-2012, 07:50 AM   #3
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Sounds like the LCM is trying to do a 'hot check' of the side marker lights to see if they are out. If there is an option in NCS Dummy to turn off the 'hot' or 'cold check' for the side marker lights, I bet that would fix it.

I don't have NCS Dummy on this computer, or I'd be able to tell you. Someone else will chime in about it though.
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Old 10-20-2012, 08:10 AM   #4
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Sometimes I think that it's best to stay OE. However, I do believe I recall some mention of coding for led lights.

Still, while I'm here...is the difference between leds and OE lights that great that it's worth it to mess around with the car's electronics?

If the motor is the heart of the car, the electronics is its nervous system. Whatever you do to fix this issue, OP, I also think you should take the OE oath, face Munich, read Bentley--230-15--three times, check coolant and PS fluid levels, and lift up your turn signal turnstalk into neutral position...that is, if only one of your side lights stays lit.
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Old 10-20-2012, 10:05 AM   #5
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Is it worth it? Absolutely. I respect that you keep your car looking exactly the same since the day it was bought new. However im 20 years old with an M3 that burns a hole in my pocket like no other. I love tinkering. I love making my lighting system on my cars stand out. Its what makes my car mine. Plus, its a simple operation that's easily reversible that my car can undergo. If i dont like it, always have the stock bulbs. I mean....come on. Tell me these arent pwetty :3




Cant see the LED corner signals (They work well btw!)
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Old 10-20-2012, 10:08 AM   #6
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I believe ive found the answer....It has to do with the constant power going to all bulbs even when the car is off. The stock bulbs dont respond to it, however since the leds draw much less. They do. Ill keep the stocks in my side markers until i find a fix.
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Old 10-20-2012, 10:18 AM   #7
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You are correct when you put led's in they draw less power than oe bulbs thus when you turn your car off the led bulbs are still charged for a little bit which is just enough power for the LEDs to stay on just faintly tho they seem like there barely on. This happens on my trunk lights doesn't bother me I think it actually looks cool that when my car is off my liscense plate is still illuminated ever so slightly
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Old 10-20-2012, 10:19 AM   #8
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So realistically, i can put them in.....and have a battery the next morning
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Old 10-20-2012, 10:21 AM   #9
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They shut off after a minute or so
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Old 10-20-2012, 10:31 AM   #10
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Thanks man, i appreciate the input.



And how clean your beamer is. Do want.
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Old 10-20-2012, 10:37 AM   #11
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Haha thanks man your car is pretty awesome keep up the good work!
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Old 11-02-2012, 12:59 PM   #12
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if you guys still have the issue, i used 5 watt 5 ohm resistors from fry's fixed the constant dimly on issue
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Old 11-02-2012, 01:00 PM   #13
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Excellent, thanks for the info dude!
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