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Thread: Rear light keeps blowing,

  1. #1
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    Rear light keeps blowing,

    The passengers side rear light blew last week so i changed it on saturday. I have just noticed that it is out again!
    I know it is possible for light bulbs to blow at any time but us there a chance i have something wrong somewhere? If so what coukd this be?

    Thanks

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    Jay.Ing's Avatar
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    I know its a silly question but... did you replace it with the right rated bulb?

    Or Get a voltmeter on it to see how much voltage it is kicking out!
    2012 A3 Ibis White SportBack Black Edition 140

    Mods so far: H&R 50mm, RNS-E, Cruise control, Interior OEM LED mood light, OEM LED number plate lights, OEM LED Puddle lights, OEM LED Footwell Lights, tear drop wiping, Beep confirm on close, pressed plates, HHA & TPMS.

    Mods to come:light/rain sensor (In progress), and so on........

    Gone But Not Forgotten....
    2011 A1 Black Sline 106
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  4. #3
    J8TT X's Avatar
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    What make of bulb did you use?
    I had that problem when I replaced them with some cheap Halfords ones. then I spent a little extra on some quality ones, replaced both sides and its been fine since.
    2005 Audi A3 2.0 TDI DSG S-line (8p1)
    Mods: 18" Gloss Black RS4's - 8p2 S-line Front Bumper - Black Grill - A5 LED Number Plate lights - LED Sidelights - Euro Style Plates - EGR Delete - RTech Custom Remap - Hot Start Issue Fix
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    2007 VW Golf 2.0 GT TDI 140 (Wife's)
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    _G_
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    This happened twice to me and third time lucky. I think it was down to oil spots on the bulb. If you change a bulb with oily fingers then it can shorten the life of the bulb. Third time I changed it with gloves and no problems since.. or it could just be that it was a bad bulb. Change it again and see how you go.

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    Bulbs are 12v 10w £3.99 for 2 from halfords. Just changed it again and the old bulb did not look like it had blown? Put the new ine it and turned the lights on and it was still out?turned the engine on and checked again and jt was on! Tried again with the engine off and it was on.will see what happens now.

  7. #6
    kev1000's Avatar
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    mine were blowing a lot and it turned out to be the bulb holder

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    Fossie

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    Quote Originally Posted by heap1000 View Post
    Bulbs are 12v 10w £3.99 for 2 from halfords. Just changed it again and the old bulb did not look like it had blown? Put the new ine it and turned the lights on and it was still out?turned the engine on and checked again and jt was on! Tried again with the engine off and it was on.will see what happens now.
    That's because the control module switches the circuit off when the bulb blows. You have to switch the ignition on to re-set the circuit after you have replaced the bulb.

    It should be ok now.

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    Quote Originally Posted by J8TT X View Post
    What make of bulb did you use?
    I had that problem when I replaced them with some cheap Halfords ones. then I spent a little extra on some quality ones, replaced both sides and its been fine since.
    I had exactly the same problem. Driver's side brake bulb replaced with a cheap halfords one and it blew again within a week. I'm always very careful not to touch the glass with my fingers so don't think this was the problem. Replaced it again with a more expensive bulb and it's been fine since.

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    Quote Originally Posted by mike foster View Post
    That's because the control module switches the circuit off when the bulb blows. You have to switch the ignition on to re-set the circuit after you have replaced the bulb.
    Clever stuff

    kev1000 > what was the issue with the bulb holder, dodgy earth somewhere?

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    Ok set off to work this morning and the light was on Got to work and checked and it was out. I turnes the engine off and on again and the light came back on! So i am guessing it is not the bulb?

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    MrLapou's Avatar
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    Corrosion / poor connection somewhere...

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    Quote Originally Posted by MrLapou View Post
    Corrosion / poor connection somewhere...
    Is it just a case of taking the connecting wire off and cleaning the metal bits?

  14. #13
    _G_
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    yeh use some contact cleaner... you can get it from halfords or maplin..
    be careful not to use a massive metal brush like i once did... it caused a spark and mini flame.. so be delicate with the an ear bud or something.. give that a go.. spray the solution and clean it gently or spray/dip the bud and the use it to clean.
    heap1000 likes this.

  15. #14
    kev1000's Avatar
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    Quote Originally Posted by mookster View Post
    Clever stuff

    kev1000 > what was the issue with the bulb holder, dodgy earth somewhere?
    it was mostly my driver side indicator that was blowing a lot.
    also my brake light didn't work some times even though the bulb was ok.
    I bought a used bulb holder on ebay for £14 and I've had no problems since.
    not sure why but I think a lot of holders give trouble after a while.
    Here is the holder I replaced

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    Sheikh's Avatar
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    I had this same problem on my A3 just before I sold it, I got so fed up of changing bulbs I took the car to the main dealer who told me the a rubber seal that sits around the light was missing? And thus water was getting in and blowing the bulbs.

    Sold the car the day after so can't really comment on a fix. Sorry.
    55' BMW 330Cd M Sport
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