[Vwdiesel] Dying Glow Plug Relays???

[paulr]

Loren, Matt,

Thanks for replying.  Seems to be consensus
about glow plug imbalances and cleaning the
glow plug bar.  Sounds wierd enough to be
the solution!

I'm left wondering how a glow plug unbalance
or worn glow plug bus would keep the relay from
clicking?  They would "click" for 3 weeks and
then stop.....

Off to the TDIforum I go.  Thanks!


Regards,

Paul

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LBaird119 at aol.com wrote:
> Can't see as harness corrosion would do that because:
> Relay resistance is near zero through switched power to GP's which
> have a  combined resistance of 1/4  ohm ish. So any corrosion
> increases the resistance and increases the mismatch from battery
> supply internal resistance and so decreases power transfer...
> Can it be that your voltage regulation is running too high and
> overloading the relay?
> 
> 
> 
>   Sounds like the same problem Dad's Passat has had since about 6 months 
> after he got it.  Don't remember the code but the "typical" cause of it is a 
> mismatch in resistance between the two glow plug circuits, so I was told.
> Matches what Matt had.  The comparator circuit seems to be a tad 
> oversensitive.
>      Loren
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> 

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Paul Reich                Electrical Engineer

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