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Glow Plug Indicator on A4 TDI

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  • 27-08-2007 4:38pm
    #1
    HotRodDub
    Closed Accounts Posts: 85 ✭✭


    Hi,
    I have an A4 TDI. A number of weeks ago I noticed the glow plug indicator starting flashing whislt driving. I read that the glow plug indicator may come on if the brake switch is faulty.

    Anyway after further investigation it turned out the brake lights started to come on when the tail lights were switched on - thus making me convinced that the problem was the brake light switch. So I got a new brake light switch a few weeks ago - only got around to putting it in on Saturday, handy enough to do and was done in about 15mins altogether with removing and replacing the cover under the steering etc.

    After the new switch went in, the brake lights and tail lights behaved in the same way as before. i.e, when the tail lights were on the brake lights were on and when the tail lights were off, the brake lights behaved as they should.

    Then I thought about the taillight bulbs, the result - a dodgy tail light blub, changed this and everything was fine!!

    So if anyone has a A4 TDI and glow plug indicator comes on - check your brake lights before anything else.


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    #2
    Marcus.Aurelius
    Registered Users Posts: 2,314 ✭✭✭Marcus.Aurelius


    Jaysus those audi electronics are legendary. Total, utter rubbish.

    Sorry to hear you had to mess about so long with it!!


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    #3
    crosstownk
    Registered Users Posts: 12,863 ✭✭✭✭crosstownk


    HotRodDub wrote:

    Then I thought about the taillight bulbs, the result - a dodgy tail light blub, changed this and everything was fine!!

    I'm not trying to be smart here, but was it a dodgy bulb or an incorrect bulb? I've seen this fault plenty of times and nearly always it's down to the incorrect bulb installed. Usually it's down to the the fact that the locater pins are offset in different ways on different type bulbs causing feedback and crossover between the side light and brake light circuits.
    Untitled Image




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    #4
    HotRodDub
    Closed Accounts Posts: 85 ✭✭HotRodDub


    crosstownk wrote:
    I'm not trying to be smart here, but was it a dodgy bulb or an incorrect bulb? I've seen this fault plenty of times and nearly always it's down to the incorrect bulb installed. Usually it's down to the the fact that the locater pins are offset in different ways on different type bulbs causing feedback and crossover between the side light and brake light circuits.

    You got it in one crosstownk!, only reason I called it dodgy is because when I go buying bulbs, the bloke behind the counter always comes back with one of two blubs - the right one and the wrong one - in that the locator pins are so far offset its obivious it's wrong.

    This blub in question was marginally offset - so much so that it went unnoticed by me - yes I put it in and I hold my hands up - but its a lesson well learnt, anyone want to buy a brake light switch?????


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    #5
    Timmaay
    Registered Users Posts: 11,394 ✭✭✭✭Timmaay


    Hmmm, same glow plug light use to come on by me the odd time. Coming to think about it, it hasn't been on since I changed a tail light bulb, so that must of been it.
    Same thing happened my friends A4, he thought it was the glow plugs, but as the car was starting grand, he just took out the glow plug indicator bulb:eek:


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