[Vwdiesel] how do I know I have a bad glow plug in newer TDI

[Tad]

Isn't it the glow plug light that flashes(for super dangerous things like
the brake lights being burned out)?  Or are they both capable of it?

On Mon, Jan 25, 2010 at 7:50 PM, James Hansen <jhsg at sasktel.net> wrote:

> > that if something else goes wrong you won't know because the light is
> > already on and you'll never notice a difference, happily assuming it is
> > only on because of the plugs.
>
> Never fear because if something really goes wrong, the MIL lamp flashes to
> indicate an immediate shutdown is necessary.  Steady light means there is a
> problem that is not fatal, and is safe to keep driving.
>
> DO NOT test any glow plug newer than a 1Z motor with 12v.  They use less
> voltage and will burn out rather spectacularly.  Ask me how I know this....
> They quickly get really white hot and look like a kid's sparkler, right
> about the time your "Oh crap" alarm goes off, the festivities end. So if
> you
> want to take pictures, be ready, it's quick.
> Test them for simple continuity to ground. A test light clipped to bat +
> for
> instance, and ground the pointy end through the glow plug.  I have never
> seen one fail to ground, although then your gp fuse would be blown, and
> master diagnosticians we all are would have checked that first anyway...
> :-)
> -james
>
>
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