Cold Start Light not working

Hi Guys
further to my previous post (thanks to Simon and David for advice).

The reason I haven't seen the cold start light glow on my S3 Diesel
is because it doesn't work. The vehicle fires up no probs but i'm having to
guess how long to hold the key in the plugs warm up position.
I took the dash out this morning and checked the bulb, it works no probs.
There doesn't seem to be any current getting to the inner part of the
holder.
I have also checked fuses.

Any suggestions on how to sort this gratefully recieved.

Cheers

Luis

Luis Troyano wrote:

> Hi Guys
> further to my previous post (thanks to Simon and David for advice).
>
> The reason I haven't seen the cold start light glow on my S3 Diesel
> is because it doesn't work. The vehicle fires up no probs but i'm
> having to guess how long to hold the key in the plugs warm up
> position. I took the dash out this morning and checked the bulb, it
> works no probs. There doesn't seem to be any current getting to the
> inner part of the holder.
> I have also checked fuses.
>
> Any suggestions on how to sort this gratefully recieved.


If you have a multimeter (or a bulb on a piece of wire!) check that
power is getitng to the glowplugs - if not, it could be the ballast
resistor (on the bulkhead - follow the wire from the rear glow-plug).

Also as David said, the plugs on the Series Land Rovers are low voltage
ones wired in series - if one is blown (or disconnected) none of them
will work. Disconnect the plugs and check the resistance on each one -
should only be an Ohm or two - open circuit means it's blown and needs
replacing.

--
Simes

> further to my previous post (thanks to Simon and David for advice).
>
> The reason I haven't seen the cold start light glow on my S3 Diesel
> is because it doesn't work. The vehicle fires up no probs but i'm having
to
> guess how long to hold the key in the plugs warm up position.
>
20 secs max.

> I took the dash out this morning and checked the bulb, it works no probs.
> There doesn't seem to be any current getting to the inner part of the
> holder.

Check the power from terminal1 of the start switch, this should be 12v when
held in glow position.
This wire(Brown/Red) connects to a resistor, then to the glowplugs
(Yellow/Brown wire) Check the glowplug end of the yellow/brown wire to make
sure you are getting power. (approx 7 volts)
If you are getting power here, then check the resistance of the glowplugs to
earth. They should have a resistance of 3.2 Ohms approx, across all 4 plugs.
If you are getting open circuit, then one or more plugs are blown. Test
resistance of each plug, which should be approx 0.8 Ohms

If you are getting power, and the resistance is OK, then your glowplugs are
working, and it is simply a fault in the warning light circuit.
The warning light is wired across the resistor. The Brown/red wire at the
bulb holder should show 12v when the switch is held to glow, and the
White/Blue should show approx 7 volts when the switch is held to glow. If
either of these show open circuit, check the wiring between the bulbholder,
and the resistor.


> I have also checked fuses.
>
The glowplug circuit is not fused.

Hi guys
thanks again for the advice.

If one of the plugs was blown or faulty would the engine still run ok and
fire up ok?

I have used the S3 today with no probs.

Sorry for the obvious questions!

Thanx
Luis

"SimonJ" <[email protected]> wrote in message
news:[email protected]...
> > further to my previous post (thanks to Simon and David for advice).
> >
> > The reason I haven't seen the cold start light glow on my S3 Diesel
> > is because it doesn't work. The vehicle fires up no probs but i'm having
> to
> > guess how long to hold the key in the plugs warm up position.
> >
> 20 secs max.
>
> > I took the dash out this morning and checked the bulb, it works no
probs.
> > There doesn't seem to be any current getting to the inner part of the
> > holder.
>
> Check the power from terminal1 of the start switch, this should be 12v
when
> held in glow position.
> This wire(Brown/Red) connects to a resistor, then to the glowplugs
> (Yellow/Brown wire) Check the glowplug end of the yellow/brown wire to
make
> sure you are getting power. (approx 7 volts)
> If you are getting power here, then check the resistance of the glowplugs
to
> earth. They should have a resistance of 3.2 Ohms approx, across all 4
plugs.
> If you are getting open circuit, then one or more plugs are blown. Test
> resistance of each plug, which should be approx 0.8 Ohms
>
> If you are getting power, and the resistance is OK, then your glowplugs
are
> working, and it is simply a fault in the warning light circuit.
> The warning light is wired across the resistor. The Brown/red wire at the
> bulb holder should show 12v when the switch is held to glow, and the
> White/Blue should show approx 7 volts when the switch is held to glow. If
> either of these show open circuit, check the wiring between the
bulbholder,
> and the resistor.
>
>
> > I have also checked fuses.
> >
> The glowplug circuit is not fused.
>
>

Luis Troyano wrote:

> Hi guys
> thanks again for the advice.
>
> If one of the plugs was blown or faulty would the engine still run ok
> and fire up ok?
>
> I have used the S3 today with no probs.

Yes it would - certainly in this warmer weather, but will take quite a
lot of cranking to start and is likely to be quite smokey when it does
start. Once started it would run as normal - the heater plugs aren't
powered once the engine is running.



--
Simes

Cheers Simon, that explains it.

Many thanks for your help again guys.

Luis
"Simon Atkinson" <[email protected]> wrote in message
news:[email protected]...
> Luis Troyano wrote:
>
> > Hi guys
> > thanks again for the advice.
> >
> > If one of the plugs was blown or faulty would the engine still run ok
> > and fire up ok?
> >
> > I have used the S3 today with no probs.
>
> Yes it would - certainly in this warmer weather, but will take quite a
> lot of cranking to start and is likely to be quite smokey when it does
> start. Once started it would run as normal - the heater plugs aren't
> powered once the engine is running.
>
>
>
> --
> Simes

Cheers Simon, that explains it.

Many thanks for your help again guys.

Luis
"Simon Atkinson" <[email protected]> wrote in message
news:[email protected]...
> Luis Troyano wrote:
>
> > Hi guys
> > thanks again for the advice.
> >
> > If one of the plugs was blown or faulty would the engine still run ok
> > and fire up ok?
> >
> > I have used the S3 today with no probs.
>
> Yes it would - certainly in this warmer weather, but will take quite a
> lot of cranking to start and is likely to be quite smokey when it does
> start. Once started it would run as normal - the heater plugs aren't
> powered once the engine is running.
>
>
>
> --
> Simes