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2.5TDi glow plug problem

Discussion in 'Classic Audi Forum' started by mmarks, Feb 29, 2004.

  1. mmarks

    mmarks New Member

    Dec 4, 2003
    Likes Received:
    Hi there,

    I know I've asked this before but I am desperate for some guidance!

    A6 quattro estate with 2.5Tdi (5 cyl) engine I think code AEL.

    Glow plug light comes on & goes out after a few seconds, takes longer when really cold so seems to be working. But no power gets to glow plugs. If I connect glow plug directly to battery it glows, If I turn on ignition it receives no power (proven by unscrewing glow plug & earthing against engine block).

    where do I look - relay, fuse etc.
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  3. mastertech

    mastertech Member

    Apr 1, 2004
    Likes Received:
    the glow system on a direct injection diesel only work when the coolant temp is 5 degrees or less.if you disconnect the coolant temp sender (blue 4 pin connector)the glow plugs will come on with ignition.are you having a starting problem?

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