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  #11  
Old 06-10-2009, 01:03 PM
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I have done exhaustive testing.. it does not matter if it is an inandecent or a LED set. Both don't work on mine.
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  #12  
Old 06-11-2009, 07:55 AM
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When the dealer fitted mine a few months ago, they asked me beforehand what type of lights I had on my trailer, they said that there are different wiring looms for the hitch set up and the re-programing is slightly different as well if you have LED's

Bozz
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  #13  
Old 06-11-2009, 08:05 AM
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centrofly is on a distinguished road
2009 x35d with LED trailer lights fully functional. Sounds like a bad trailer light module from BMW. It happened to me on my previous x3, drove me nuts. Have the dealer replace the light module! Otherwise you'll be in a straight jacket.......
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  #14  
Old 06-15-2009, 12:49 PM
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Brake lights not working on trailer

My 2008 X5 did not work with LED trailer lights. I took it back to the dealer just two months ago and no change. I changed out the rear lights on the trailer to regular bulbs and all is working.
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  #15  
Old 06-15-2009, 01:26 PM
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I had a problem with the trailers brake lights on an E70 I installed the hitch on... The trailer had regular lights too, not LED. Ended up goint to the parts store and buying a $15 plug in trailer plug tester with LED lights to show activated circuits, and the blinkers and running lights worked, but not the brake lights with the tester as well. Tested against another E70 w/trailer, all worked right.

Final solution, I replaced the trailer module (which was only days old). All worked right since then.
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  #16  
Old 06-23-2009, 07:25 PM
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turns out the dealer couldn't fix the problem. I guess they have to wait for BMW to write a software program so the trailer works with LEDs. They agreed to switch over my trailer to conventional lights and give me $600 as compensation.
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  #17  
Old 06-23-2009, 07:30 PM
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Damn, they're retrofitting your trailer and paying you compensation...? That's might big of them!
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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot


You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is
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  #18  
Old 06-24-2009, 08:54 PM
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there is a fix now.

http://www.bmwtis.net/tiscode/cgi-bi...0&session_id=0
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  #19  
Old 08-25-2012, 05:03 PM
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anyone know the fix that's posted in the link above? it says unauthorized when I click the link.
I just installed my OEM hitch today and I'm having the trailer brake issue also. Any help is appreciated.
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  #20  
Old 08-26-2012, 09:34 AM
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Did you get the car programmed? I have all LEDs on my boat trailer and there isn't any issue with the LEDs.
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