LED Resistor?
Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: Detailing & Car Care
Forum Discription: Want advice on how to give your car some TLC?
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=37227
Printed Date: 30-April-2024 at 03:37
Topic: LED Resistor?
Posted By: thepits
Subject: LED Resistor?
Date Posted: 14-May-2007 at 14:46
|
Fitted LED Brake lights and now the ODC warning comes on. I know I need to fit a (two?) resistor(s) to convince it that they haven't failed, but does anyone know the value? I've already done the google search, and 10 ohm / 50 w seems to be favourite, but this was for normal rear light use, and at that wattage to cope with the heat of constant use - which brake-lights aren't. Any suggestions? ------------- Cats know your every thought. But don't care. |
- but as I expected 
Replies:
Posted By: thepits
Date Posted: 14-May-2007 at 21:25
|
I'll take that as a "no, not yet" then!
perhaps this should be in detailing? ------------- Cats know your every thought. But don't care. |
thepits wrote:
Posted By: thepits
Date Posted: 15-May-2007 at 22:32
|
here it is then! ------------- Cats know your every thought. But don't care. |
Posted By: alanross
Date Posted: 15-May-2007 at 23:16
|
I take it you have taken a supply from one of the tail lights? Why not try taking a supply from each tail light to equal the load. Remember this worked on an Audi 100 thing a while back. Alan. |
Posted By: Horsetan
Date Posted: 15-May-2007 at 23:43
|
What LED lights are you using, and on what car? Hope you're not using LED "bulbs"- most of them are sh*te when it comes to daytime illumination. There are a few ways of getting round this, some better than others. You can use load-equalising resistors, as http://autolumination.com/equalizers.htm - HERE :
If you're wanting to work on a custom-built LED setup for your light clusters, suggest you have a good read through http://www.hidplanet.com/forums/viewforum.php?f=3 - this Forum -------------   
|
Posted By: thepits
Date Posted: 16-May-2007 at 08:49
|
Thanks Ivan ......... (I knew I should have posted this here in the first place!) ------------- Cats know your every thought. But don't care. |
Posted By: Horsetan
Date Posted: 16-May-2007 at 10:14
|
http://vid71.photobucket.com/albums/i129/drknss99/led%20tail%20light%20retrofit/day.flv - Toyota Yaris LED custom set-up View original video http://www.hidplanet.com/forums/viewtopic.php?t=31872&sid=dc61cb8ff1612470b9165871c9b4735c - HERE (partway down the page) -------------
|
Posted By: Nigel
Date Posted: 16-May-2007 at 13:51
|
Interestingly pittsy, oh pink pest, is whatever your trying to use type approved for use with your light clusters ????? I somehow doubt it, and the led whatevers need the correct approval stamp on them before they can be used with any motor vehicle. ------------- Best Wishes Nigel |
Posted By: gjoconnor92
Date Posted: 16-May-2007 at 17:03
|
Interesting One of the advantages of LEDs is low power low temperature running. But to get the computer to not think a bulb has blown you have to put in a device(resistor) which uses power and gets hot. So BMWs can be environmentally friendly but only if you buy them as such from BMW and not modify them later. Anyone know if the computer can told that bulbs have been replaced by lower current devices 10 ohm 50W would be a good choice, a 21W bulb equates to 7 ohm resistor and at high wattage you only get them in 5 ohm and 10 Ohm Hope that helps ------------- Gerard O'Connor 
1989 E30 320i for track day use 1972 2002 competition car project (delayed!!) http://homepage.eircom.net/~goconnor/Fvee1/FVee.htm - Sheane Formula Vee mailto:bmw2002_92@yahoo.ie - My e-mail |
Posted By: Horsetan
Date Posted: 16-May-2007 at 23:37
....and service length before the LED actually fails.
Simon would be better off finding the Check Control box (if his car has one) or the LKM and seeing if he can "fool" it at source, rather than having resistors spliced in anywhere else..... -------------
|
Posted By: bmwcare
Date Posted: 19-May-2007 at 00:02
This all depends on the car in question... As a basic rule, any of the "old chassis" cars - E46/E39 - need the correct Lamp Control Module (LKE/LSZ). The example I'll use is a 2000 E46 - converted to later type LED tail lamps. The "proper" BMW way to do this is to buy the retrofit kit. This consists of 2 tail lamps and a new LSZ. The new LSZ has to be coded to the car as it stores lots of info including mileage etc. This is rather expensive but does retain all the benefits of proper LED (less power consumption, correct interaction with OBC etc.) The second way is to fit the OE lamps but fool the LSZ - put a load on the circuit equal to the "old type" lights... This involves resistors etc. and a little modding to the wiring. Some of the styling companies (MAX Power for BMW sorta thing) supply lamps & resistor packs etc. ---------------------------------- Regarding recoding the LSZ for the new type lamps - can't be done. However, a s/h newer type LSZ can be recoded to match an older car. The wiring on OE fitment is different. E46 saloons run from start of production >>> 2001_09 and from 2001_09 >>> End Of Production. Coupe's and Convertibles are different again. It does get sort of complicated :( I've not done any of the E60/E90 type yet for this - they're not really old enough for owners to start messing around that way with them. However, on these modules the Light Centre is flash programmable so a new one "shouldn't" be necessary. Hope that didn't confuse more than help... Eddie. ------------- BMW & Mercedes Specialist. Galway & Surrounding Areas. http://www.bmwcare.com - www.bmwcare.com http://www.mercedescare.com - www.mercedescare.com All BMW models covered including E60/E90/F01/F10 with flash programming/CIP/coding as required |
Posted By: Horsetan
Date Posted: 19-May-2007 at 17:38
|
I hope you're not using these, Simon:
....'cos they're sh*te -------------
|
Posted By: thepits
Date Posted: 20-May-2007 at 18:16
nope, I'm using these -
which shine white, as i've got them behind the original Red Lenses.
p.s. I appear to have sorted the OBC by fitting a pair of 10ohm 25watt (couldn't get 50watt quickly/cheaply) resistors. They get warm - as I expected - but should be ok for the Brake-Lights as I don't use them that often p.p.s. Thanks again for the help.
------------- Cats know your every thought. But don't care. |
Posted By: Horsetan
Date Posted: 20-May-2007 at 22:22
Hope those aren't the 18-LED ones. 20-LED versions are better. -------------
|
Posted By: thepits
Date Posted: 20-May-2007 at 22:29
|
"la-la, wibble-wibble, not listening" ------------- Cats know your every thought. But don't care. |
Posted By: Nigel
Date Posted: 21-May-2007 at 00:19
|
Simon, you have my number, ring me anytime with component requests (although I'd imagine you have the same accounts at work). ------------- Best Wishes Nigel |