The ECS Led Tails are not plug and play to get them to work properly. What i did was re pin the rear light plugs and repin the 2 plugs under the dash and add on rear fog light wire to the
cecm next was to recode byte 18 of the central electronics unit. It took me almost 6 months with the help of Dana, this forum and luck to accomplish this. I have damaged 1 or 2 electrical connectors but replaced them and learned. So when are you going to start?
Follow the wiring mod for "Amber Tails" its easy to do, use staples from a staple gun to get the pins out of the connector. The colors on the 2010 wires are different but the moves are the same. Then recode byte 18 as Bigshaft suggests.
BTW I still have a bulb out message, have not figured out how to turn off the cold diagnostics on the 2010 cars.
driving it like I stole it and 46.4 mpg last tank!
Last edited by AlwayzDubbin; 12-16-2010 at 12:43 AM.
I received and installed my set of Euro tail lights today. They are the dark cherry ones from ECS Tuning and I switched the pins around per the DIY writeup. Everything is working 100%, rear fog light and amber directionals with no "light out" faults to be seen!
A little background:
Hi-Line CECM module: 5K0937087CZ0X
Euro LED Tails
Byte 18 is: 0E
My long coding is: 2D200B1E902F3EE48008008160008B0401000E86510085605C8020000040
Not sure if mine works 100% because of the Hi-Line module upgrade but all is perfect and the Jetta is ultra fly now!
Last edited by AMD IS THE BEST; 12-27-2010 at 09:50 PM.
and for the coding to AMBER is it the coding above with the bold 0E? did you also disable the cold diagnostics? i dont have a rear fog light, would the coding still be the same as above? thanks for your help, I appreciate it!!
Drivers side: Swap pins 2 & 3
Pass side: 4 moves to pin 3, 3 moves to pin 2 and 2 moves to pin 4.
I have the drivers side reverse light wire (no rear fog) moved from A28 (at the CECM) to C47. The wire that was in C47 gets left out.
Byte 18 to 0E (Premium RoW Golf, or something like that)
My long coding has a lot of other things in it (bi-xenon, fogs, fogs as DRL and a bunch of other tweaks), so I don't recommend you guys using it.
I want to add, that maybe mine are not 100% perfect. When powering on the car, they flicker all the lights by what seems to be a self test to verify everything is functioning. This may or may not be normal and may or may not cause damage...from what I understand.
I had some faults for rear lighting that didn't return with consistency, but I'll note the RR tail light fault was the most consistent. I did not move any wires with the LED Gti tails, and as you noted above, the additional RR wire swap may be needed to resolve that.
I haven't burned up the 5K0 BCM yet, even with the Xenons plugged in, so I'll continue testing the Byte 18 coding and see what is...and is not similar to the Gti retrofit. In the meanwhile, I have a bunch of old and random pics here and I can photo your old BCM if you want to use the lack of front fog pins and such as example in the write up.
It seems like I'm next in line to get my LED tails done w/ rear fog option of course Unfortunately there are back ordered so I'll have to wait another month before I can start playing with it.
My long code is:
Last edited by WhiteWolfie10; 02-11-2011 at 08:36 PM.
Rain Closing Windows, goF raeR, Aspherical Mirrors, Remote Windows, Amber Club
I didn't insert the C47 back into A28 (left it unused taped up), I have halogen headlights but that wire isn't used at the bulb.
I used OEM Tails from MKSTuning, did rewiring on the tails.
I didn't change the Byte 18 from "00" to anything else.
I have no faults whatsoever, tails work with amber turns, You may want to give it a try.
MY CECM is lowline 5K0-937-084-A on my 2010 Jetta TDI Sedan Highline Trim built 09/09