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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 09-14-2006, 01:34 PM   #1
12CMiM3
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need help asap with led taillights...

hey guys,
i took my car in for the emissions recall. and asked them to reflash the lcm while it was there (did the led taillight retrofit). they just called and said the led taillights were flashing and that the connection is bad. and that they can't do anything about it cuz it's not oem.
thing is, i got the part from a bmw dealer. i heard the led's flash in sequence when not reflashed. i told him this but he says it's the connection and that the install wasn't done properly. but this is plug-n-play, isn't it?
what should i tell them. or instruct them.
help, anyone????
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Old 09-14-2006, 02:29 PM   #2
12CMiM3
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anyone with any advice???
want to tell him before he finishes up.

please~~~
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Old 09-14-2006, 02:35 PM   #3
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Yes, they should be plug and play. Are you sure these OEM lights?
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Old 09-14-2006, 02:38 PM   #4
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Originally Posted by ca1242 View Post
Yes, they should be plug and play. Are you sure these OEM lights?

thanks!
i'm pretty sure they are...got em from unique design who sed they were oem. the shipment came from a bmw dealership, so i can only assume they are.
it seems like since the leds were flashing at the beginning that the SA thinks its a connection problem.
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Old 09-14-2006, 03:27 PM   #5
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The flashing/strobing is from the Check System of the car making sure you don't have any bulbs out. Did they reflash your car to accept LEDs? As long as you have the later style LCM it should be able to be reflashed to accept the LEDs if these are OEM LEDs. Otherwise the early LCM can't be reflashed.
I don't see how you could have connected them wrong. Either they will plug in with the adapter or they won't. I can't see the Tech not just pushing the connectings in further had they actually not been connected right(which would be hard to not plug in all the way).
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Old 09-14-2006, 03:45 PM   #6
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^^ What he said for the strobing at the beginning. Have them check to make sure they flashed it. If not, you can always build a "filter" using some resistors and capacitors.
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Old 09-14-2006, 07:17 PM   #7
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ok so here's what happened...
i go to the dealer and tell him i don't understand what the problem is. i doubt that the connection is bad b/c it's basically plug n play. he says, well, not really. not really?!? you install it and plug the wires in...that's pretty much plug and play to me. anyway, he said the tech adjusted the wires so the lights are out now, but they want guarantee that it won't come back on. also said that it didn't need the reflash.
and i told him that i got the parts from another dealer so that i'm fairly certain that they're oem parts.
what do you think? kinda seemed like maybe he was wrong so he just said that they "worked with the wires" to make it seem like they did ME a favor or something. who knows? maybe they were right. sounds a little fishy to me though.
any thoughts?
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Old 09-14-2006, 11:10 PM   #8
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If you got BMW tails you should have also gotten the BMW adapter connectors. It is a set of wiring adapters (about 6 inches long each) that connect the old connector from the car to the new connector on the tailight. They are specific to each side of the car and have a label for left and right. You may have put the wrong one on each side. Car after 9/01 don't need a new LCM. Just a reflash of the LCM using the LED tail retrofit path.
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Old 09-15-2006, 03:36 AM   #9
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Originally Posted by 12CMiM3 View Post
ok so here's what happened...
i go to the dealer and tell him i don't understand what the problem is. i doubt that the connection is bad b/c it's basically plug n play. he says, well, not really. not really?!? you install it and plug the wires in...that's pretty much plug and play to me. anyway, he said the tech adjusted the wires so the lights are out now, but they want guarantee that it won't come back on. also said that it didn't need the reflash.
and i told him that i got the parts from another dealer so that i'm fairly certain that they're oem parts.
what do you think? kinda seemed like maybe he was wrong so he just said that they "worked with the wires" to make it seem like they did ME a favor or something. who knows? maybe they were right. sounds a little fishy to me though.
any thoughts?
Sounds to me like they never did the reflash before and are back pedalling. Although you do have the later 2003 LCM, the car is still set-up to check for filament bulbs. I can't see how there is any way that the car wouldn't throw fault codes or lights out when installing the much different LEDs without teaching it/coding it to accept? You just can't throw in LEDs on a car not equipped with LEDS and have it work without dash warning lights triggered. I have not heard of anyone ever doing it by simply plugging in and being done.
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Old 09-15-2006, 06:51 AM   #10
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If they lit up before, they were plugged in already. There is no "partially plugged in" connection. Sounds like they didn't flash it the first time. So it is all well now?
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Old 09-15-2006, 07:03 AM   #11
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Quote:
Originally Posted by Alex323Ci View Post
The flashing/strobing is from the Check System of the car making sure you don't have any bulbs out. Did they reflash your car to accept LEDs? As long as you have the later style LCM it should be able to be reflashed to accept the LEDs if these are OEM LEDs. Otherwise the early LCM can't be reflashed.
I don't see how you could have connected them wrong. Either they will plug in with the adapter or they won't. I can't see the Tech not just pushing the connectings in further had they actually not been connected right(which would be hard to not plug in all the way).
Quote:
Originally Posted by BMWBoiDE View Post
If you got BMW tails you should have also gotten the BMW adapter connectors. It is a set of wiring adapters (about 6 inches long each) that connect the old connector from the car to the new connector on the tailight. They are specific to each side of the car and have a label for left and right. You may have put the wrong one on each side. Car after 9/01 don't need a new LCM. Just a reflash of the LCM using the LED tail retrofit path.
My M3 is 2002 (build date 9/01) do I need a new LCM or can they just reflash mine?
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Old 09-15-2006, 08:27 AM   #12
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Quote:
Originally Posted by BMWBoiDE View Post
If you got BMW tails you should have also gotten the BMW adapter connectors. It is a set of wiring adapters (about 6 inches long each) that connect the old connector from the car to the new connector on the tailight. They are specific to each side of the car and have a label for left and right. You may have put the wrong one on each side. Car after 9/01 don't need a new LCM. Just a reflash of the LCM using the LED tail retrofit path.
yup, used the new wires that came with the led "kit".

Quote:
Originally Posted by Alex323Ci
Sounds to me like they never did the reflash before and are back pedalling.
that's what i think. i think they said it can't be done b/c of blah blah blah. i told them it should be able to be done. they prolly tried it and it worked and didn't want to look like they didn't know what they were doing so they told me it didn't need to be reflashed, but we "worked with the wires" for you and it worked. at least that's the feeling i got.

Quote:
Originally Posted by ca1242
There is no "partially plugged in" connection. Sounds like they didn't flash it the first time. So it is all well now?
i know. that's what i was saying. it's plug n play. it's either in or it isn't. and he responds to it with a "not really". ah well. but it seems to be working now. granted, it's only been a day. and by "working" i mean the warning lights haven't showed up.

what's weird is that this was supposed to be a pretty reputable dealer/service dept. i figured they'd know their stuff.

Quote:
Originally Posted by bagher
My M3 is 2002 (build date 9/01) do I need a new LCM or can they just reflash mine?
i think you need the LCM, but i'm not definite. i'm not sure exactly when the cut off is. i thought it was at 2002...so 2003+ you're good to go.
nice car, by the way.
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Old 09-15-2006, 08:30 AM   #13
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thanks, does anyone have a part # for the updated LCM? Also if you buy an updated LCM does it still need to be reflashed?
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Old 09-15-2006, 08:47 AM   #14
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THey screwed up, came up with BS story to cover it up. Everybody makes mistakes. I just can't understand why people can't just admit it and take care of things.
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Old 09-16-2006, 10:00 PM   #15
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plug n play isnt oem. the oem ones you need to buy a cable set, bulb carrier, bulb socket, two bulb holders, and two covering. i am in the process of installing my led taillights. good luck
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Old 09-17-2006, 01:29 AM   #16
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plug n play isnt oem. the oem ones you need to buy a cable set, bulb carrier, bulb socket, two bulb holders, and two covering. i am in the process of installing my led taillights. good luck
where did you get that info? You need the LED lamps, the adapter cable set, the bulb carriers, and maybe the side coverings(although the original ones will work also). I've had mine on for almost two years now, installed them myself.
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Old 09-17-2006, 10:39 PM   #17
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plug n play isnt oem. the oem ones you need to buy a cable set, bulb carrier, bulb socket, two bulb holders, and two covering. i am in the process of installing my led taillights. good luck
but the cable set is just plugged in and then played....is what i meant.
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