Numberplate bulbs..

K1Rob

Guest
Evening,

I bought some LED numberplate bulbs yesturday and they arrived this morning, i wanted to get rid of the yellow'ish light so i went for some 6000k LED bulbs..

Now, ive just tried fitting them and it throws up a bulb error code on the dashboard, is there anyway to get these bulbs to work with these cars or is it a no-go with something like this?

I know these cars have sensors here, there and everywhere to warn you of things but surely something as silly as a numberplate bulb?


Thanks in advance..


Rob
 

Fl@pper

Back older greyer and less oilier but always hope
Jun 19, 2001
12,368
25
Gloucester
if it's led then it's using less current than a standard one and hence why the warning lights are flagging up as the ecu thinks it's blown them

one solution would be to add a resistor to the equivalent value of the original to 'fool' the test system

i couldn't tell you what value is required as i dont' know what bulbs were in there but you could always replace them and test the wiring
 

mark1231

Active Member
Sep 29, 2009
146
0
OPERATION
The trailer control unit assumes the following
functions:
- Activation of trailer lights.
- Trailer light bulb monitoring.
- Deactivation of Park Pilot system.
- Self-diagnosis.
The control unit monitors the following trailer
light bulbs:
- Parking.
- Number plate.
- Brake.
- Indicator.
This monitoring is performed by the control
unit, generating a low voltage impulse to the
bulbs and checking their consumption.
When the indicators are switched on, a
message is passed to the comfort CAN-Bus line
to activate a flashing warning light on the
instrument panel for the trailer indicators. If there
is a fault in the trailer indicators, this warning light
will remain off.
If the fault is in the parking, number plate or
brake light bulbs, the trailer control unit will send
a message to activate the faulty bulb warning
light.
The fog light and reverse lights are not
monitored since all trailers do not have these
lights.
If there is a fault in the control unit processor,
the brake light activation will be performed by
avoiding the processor to ensure their operation
as a replacement function.
D97-58
J345 Trailer control unit
J446 Park Pilot control unit
J527 Steering column control unit
J519 On board network control unit
E1 Light switch F Brake pedal
switch
Trailer parking light
Trailer number
plate light
Trailer brake light
Trailer reversing
light
Trailer fog light
Right trailer indicator
Left trailer indicator
J533 Gateway
J285 Instrument
panel control unit
Bulb warning light Trailer indicator
T13 Trailer
you must fit the same bulb the dealer could turn the function off by coding
j519
 
Last edited:

K1Rob

Guest
Thanks for the reply guys.


Mark - The car is a cupra K1 mate

Flapper - My old bulbs were/and still are working, i just wanted to change them so the wiring is ok.. and theres no way i could fit a resistor to the new LED's.. Is there no other way of stopping the ecu throwing up the fault code and in turn, not making the bulbs light up?. I was looking forward to getting these on, but there always seems to be a hurdle to jump with these cars and ive only had it 5 minutes..

Mark1231 - So all i need to do is stop a message being sent to the Can-bus line? lol :)..
 

Alex 17

No Smoke No Poke
Aug 17, 2008
1,920
0
Bedale - North yorkshire
Thats the problem with the seat leon , The Can-bus system , Causes helish problems , Also need special LED's 15 quid, Great though , And special hids that are quite alot! If you want any of theys just pm me and ill link you to where to get them!
 

dannychapman10

K04 Time ;)
Mar 30, 2009
1,268
1
Grimsby, UK
Yeah, had the same problem with my LED sidelights and HIDS. HID kit cost over £100 for CAN-BUS version and had to get resistors for my sidelights.
We normally say 470R resistor does the trick, I used them on my LED sidelight bulbs and tell other customers to use them.
(bonus working at Maplins lol :D )

Danny.
 

ross27

Mazda 3 MPS
Mar 22, 2009
363
0
Glasgow
Just took some tonight. Not the best photos, and nothing to compare to standard, but i hope they are of some help!

DSC03904.jpg


DSC03907.jpg


DSC03906.jpg


DSC03905.jpg


And you can see my latest addition in that photo ^^ reversing camera :p

DSC03920.jpg
 
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