BAVToys
Results 1 to 1 of 1

Thread: Canbus cancellers only work when LEDs are on?

  1. #1
    Join Date
    Jul 2007
    Location
    Costa Rica
    Posts
    6,709
    My Cars
    Blown 528i, KE30, Pathy

    Canbus cancellers only work when LEDs are on?

    Hey folks,

    I recently baked open and upgraded my E39's headlights. I replaced the projectors with Evo 2.0s and also took the chance to install a set of "cotton" LED halos (https://www.ebay.com/itm/312284929379). I wired them as parking lights (same as the stock halos) but weirdly, the cancellers (not even sure if they are canbus tbh - I took them apart and they do seem considerably more complex than just a simple resistor) that came with the halos only remove the bulb out error when the LEDs are on. More precisely: the brief bulb check pulse that the LCM generates is not enough to get rid of the error. The halos need constant current to work properly. As soon as I turn the parking lights off, the error eventually comes back (takes a minute or so). I guess they were designed just for DRLs that are meant to be on at all times.

    I can't code the hot/cold check out since I have an LCM II and I need at least an LCM IV and I really, really lack the skills and motivation to go down that rabbit hole just for that. Perhaps someone here has had to deal with a similar behavior in the past and there's a solution? I mean, it's not the end of the world but my car is error-free otherwise. I thought of adding simple load resistors just before the existing cancellers but I'm concerned about putting stress on the LCM or the wiring.

    These are the cancellers:


    Headlights in question:
    Last edited by crdiscoverer; 08-24-2021 at 06:34 PM.
    Resident Third World Country Advisor

Similar Threads

  1. F25 X3 license plate lights not working after led mod
    By CoolFX in forum 2003+ X3, X4 (E83, F25, F26, F97, F98, G02)
    Replies: 3
    Last Post: 05-13-2016, 04:35 PM
  2. Do Canbus HID Ballasts work for E36?
    By Lou the Greek in forum Lighting sponsored by BAVToys
    Replies: 4
    Last Post: 08-03-2014, 05:18 PM
  3. brake lights does not work with led bulbs
    By czynot in forum Lighting sponsored by BAVToys
    Replies: 7
    Last Post: 07-14-2009, 02:20 PM
  4. DDM Warning Light Cancellers..Not Working?
    By ///BMW in forum Lighting sponsored by BAVToys
    Replies: 12
    Last Post: 10-15-2008, 01:49 AM
  5. Replies: 25
    Last Post: 11-21-2003, 04:19 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •