[Vwdiesel] Glow plugs

[Dan Stock]

I already checked the glow plugs with my multimeter
and they are burnt out (all of them).  I have 4 used
ones that test good but just want to find out what
burnt them out before hooking up the new ones.  Is 45
to 50 seconds to long for them?  If so, is it the
relay that controls how long the plugs get voltage?

Thanks,
Dan
--- Roger Brown <r.c.brown at ieee.org> wrote:
> Dan Stock wrote:
> > I have a 1981 Rabbit diesel 1.6na.  It will not
> start
> > and I figured out that all the glow plugs are
> burnt
> > out.  I also checked how long battery voltage was
> > reaching the plugs after turning the key.  It was
> > around 45 to 50 seconds.  I don`t know how long
> they
> > should get voltage but this seems to long to me.
> Can
> > anyone tell me how long they should get voltage
> and
> > would this be a glow plug relay problem?  If I
> can`t
> > figure it out I am thinking of just using a relay
> and
> > swith to cycle them manualy.
> 
> You need two things to get the glow plugs to heat
> up, you need the voltage to be
> present, but if they are burned out, there will be
> no current flowing.  The heat comes
> from the current flowing.  Since you have voltage,
> its likely the GP relay, fusible
> link and wiring is fine.  You need to test the glow
> plugs to find out if they are
> indeed working:
>        
>
http://www.4crawler.com/Diesel/CheapTricks/GlowPlugs.shtml#GlowPlugTesting
> 
> -- 
>     Roger
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