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LED Number Plate!!

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Maq, Feb 24, 2010.

  1. Maq
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    Maq Quattro_AvQ

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    Been forver searching for a decent pair of LED number plate lights...searched the forum and found a pair for 35quid+...dont really want to be wasting the student loan on that..anyone know of any inexpensive LED's which dont throw up a error?

    Much Aprreciated!
    #1
  2. Wrath
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    Wrath Well-Known Member

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    #2
  3. doug.p
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    doug.p Getting There

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    i will soon tell you as i am fitting a set of these at the weekend
    #3
  4. pjmspeedy
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    pjmspeedy Dude, what's mine say ?

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  5. Turkster
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    Turkster Bro.Paul 2.5TDI Quattro Sport

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  6. Maq
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    Maq Quattro_AvQ

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    Is it 12quid for the pair? or for each bulb...look quality!. Got the coming home lights on my car which also lights up the number plate..so i reckon it should change the look!
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  7. Turkster
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    Turkster Bro.Paul 2.5TDI Quattro Sport

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    i got a pair for my £12
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  8. Maq
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    Maq Quattro_AvQ

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    Ordered! Thanks everyone..hopefully shud be simple to fit!
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  9. doug.p
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    doug.p Getting There

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    Got mine - same as i n the ebay link on friday
    fitted today
    look lovely
    but........
    'Rear numberplate blub' in the warning on the dash !!!! GRRRRRRRRR
    :mad:
    so they do not work with the B7
    i like so if i get resistors will the warning dissaper ?? anyone know? if so which ones can i get and where from ?
    i also purchased some audi compatable LED sidelights 360 degree ones as i have them in another car no probs, in this one ' sideligh' warning, so resistors needed there also
    am fitting a H7 Hid kit tomorrow........ gonna test before i go the whole hog i think, even though its £200 kit from hids 4 u and meant to give no warnings
    #9
  10. danotto
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    danotto VAG HUNTER

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    mate ive just fitted some today and got the number plate bulb warning,this is a pain in arse,i ordered some normal led ones before and messed around with resistors but it just a pain in arse as you have to wire them in series.
    #10
  11. doug.p
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    doug.p Getting There

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    ok - time to sound thick here
    whats wire in series ??
    i have wired some resistors to my astra i used to have, it was literally a case of soldering them between the 2 wires
    how would i use a resistor on my a4 ?
    would the same apply for the side lights and things like indicator bulbs leds
    #11
  12. danotto
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    danotto VAG HUNTER

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    it might be me being thick as it might be in parralel,but basically im pretty sure the resistors have to be wire like ---resistor----led------resistor----led not


    led led
    resistor resistor


    If that makes sense
    Last edited: Feb 27, 2010
    #12
  13. doug.p
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    doug.p Getting There

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    so one resistor across both wres on each light
    r could i soldier to the back of the bulb perhaps?
    i thought a resistors point was to trick the cars ecu into thinking there is 'load' on the wire as leds use less power the ecu things the bulb has gone due to reduced current
    so where exactly in laymens terms do i put the resistors
    #13
  14. TorqueTerrorist
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    TorqueTerrorist Audi A4 S-line Avant 2.0T FSI

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    The reason the warning occurs is because with a normal bulb it makes a circuit which is what creates the resistance needed for the system check. In an LED the diode doesnt make a circuit. Look closely at an LED and you will see the two pieces of metal which emit the light dont actually touch therefor no circuit is created, hence the need for a resistor
    #14
  15. rowdyboy
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    rowdyboy Member

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    Is the "light out warning" a standard feature?? These bulbs can't work on some cars and not others. Has anyone upgraded all their front lights to LED's?? I was looking for some front fog LED upgrades.
    #15
  16. Maq
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    Maq Quattro_AvQ

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    Anyone know what Resiters/ohm rating we have to use to cancel the warning?
    #16
  17. doug.p
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    doug.p Getting There

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    ditto the above
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  18. Wrath
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    Wrath Well-Known Member

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    Wonder why they work on some cars and not others, is it year related?
    #18
  19. doug.p
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    doug.p Getting There

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    i am on this - started a thread about LEd / SMD
    am refitting at the weekend, have purchased a load of resistors and will let everyone know
    #19
  20. Benpage
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    Benpage New Member

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    tried resistors in mine they get very very hot so just by accident i wired up a 5 amp bulb extra on same circuit as number plate bulbs and no problems with warnings etc perfect no flicking and bulb not hot at all, just means a light on in boot
    A4 08 plate cab
    #20
  21. Maq
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    Maq Quattro_AvQ

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    Yeh i saw that on a bmw website....does the birghtness of the LED become slighlty dim due to the extra resistence?
    #21
  22. Yellowtrophy
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    Yellowtrophy Member

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    I wouldn't have thought so....certainly no more so than if you put a resistor in parallel with the LEDs
    #22
  23. doug.p
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    doug.p Getting There

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    just to save peole time and agro - the leds at the start of the link via ebay do not work, they give light out warnings and the seller offers no explination and no refunds or exchanges
    avoid and see my guide after sunday for working results ( hopefully ) lol
    #23
  24. razza1
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    razza1 Well-Known Member

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    I had these, didn't work on the 2007 model (even managed to break one trying to fit it), but got a refund from the same shop (f1autos) and told them they should adjust their advert saying they didn't work with 2007 models.

    Push for the refund ;)
    #24
  25. doug.p
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    doug.p Getting There

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    will do
    i have sent 4 emails now, i am gonna just do it via paypal
    the ad still says b7 compatable
    #25
  26. razza1
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    razza1 Well-Known Member

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    call them on the number they sent with them (not the ebay route..) ;)
    #26
  27. doug.p
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    doug.p Getting There

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    got a reply saying to post back for a refund ! which i have done
    got me some other ones now - over on my LED thread
    #27
  28. razza1
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    razza1 Well-Known Member

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    nice one
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  29. alpesh26
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    alpesh26 Member

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    I managed to fit my number plate LED's this weekend. I managed to get round the error on the DIS by fitting resistors to the bulb holders (although is does beep when I turn the car on but the warning goes away straight away), my set up is:

    One 150ohm resistor on one of the bulb holders

    and

    One 100ohm resistor AND One 120ohm resistor on the other bulb holder.

    The problem is, the one with the 2 resistors on is dimmer and has more of a blue tint than the one with one resistor (probably due to the current the resistors are drawing).

    Which resistors did you guys use? I've only spent £2.75 on this mod so far so I should have some budget for more resistors :thumbsup:! I havent bothered with heatsinks and things, drove around for an hour and a half with the lights on and nothings melted.
    #29

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