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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 08-30-2009, 12:30 PM   #1
M3 Baddie
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day time running lights...

How do they work? are they the highbeam function on the M? and can dealer turn this option on?
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Old 08-30-2009, 03:26 PM   #2
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The DRL's are operated through the high beams, not only on the M's. They're supplied a low wattage (2.5V) from the LCM to be on when the ignition is on, and yes the dealer can turn them on/off.
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Old 08-30-2009, 04:06 PM   #3
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awsome TY!
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Old 09-01-2009, 10:45 AM   #4
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if you have bi-xenons than your high beams are your xenons, hence bi, the DRL's are only used for DRL and flashing oncoming trafic
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Old 09-01-2009, 12:40 PM   #5
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Your dealer or someone with a GT1 can program your car to have or not have DRL
Bixenons work by raising a flap when you lock out the high beam function on your stalk:

Bixenon do not affect flash to pass - your inner "high" beam units, those are still in affect when you pull the stalk towards you.

DRL functions at 1/2 (6V) voltage - which is generally between 25-35W output - for the standard 55W H7 bulbs in your high beams.
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Old 09-05-2009, 04:40 AM   #6
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my dealership Gault said they could not turn them off. what can i do from here

i took out the high beam bulbs so that my DRL could be on when ignition is turned on

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