2012 Jetta Sportwagen Xenon w/ LED DRL retrofit. DRL inop.

  Jan 21, 2017 #41  

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m87a

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glad to hear you pluged all 3 connectors for drl you swapped wires ,same side turn signal drl off change them you will fix that
for byte 18 try 49 and report back

 

  Jan 22, 2017 #42  

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McGuirk

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Funny thing is I never touched the DRL wiring going into the CECM. So if it's backwards it's stock.

 

  Jan 23, 2017 #43  

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Byte 18 hex 49 didn't work with the LED's. They wouldn't even turn on as DRL's.

 

  Jan 24, 2017 #44  

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I'm thinking jumpering pins 10 and 12 might be the only way to get them to light up with the headlights on at night. DRL functionality obviously doesn't require it as I figured out.

 

  Jan 24, 2017 #45  

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try to swap pin 10 and 12 and report, jumpering pins 10 & 12 will give you led full brightness all the time