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claysontelevision@yahoo.ca - 24 Aug 2006 16:02 GMT

Hello

I have an 84 Scirocco. The problem is the LED on the water temp gauge.
It flashes continuously. It worked normally when I first had the car.
Over the years it stayed on longer and longer until now - it won't
stop. I have also had at one point the fuel and water gauge both not
working but that was short lived. I have replaced the temperature
sender (the temp needle has always worked fine) I have replaced the
connector on the end of the wire. I don't think that i have a sensor in
the coolant resevoir. So I am stumped. What is causing the LED to flash
while the temp gauge seems normal? Any ideas would be appreciated. And
the car is not overheating. Are the fuel and temp gauges connected in
any way? No matter how much gas I put in the needle never will reach
the top of the fuel gauge - but that I can live with - the flashing LED
is starting to drive me nuts.

thanks Matt

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Andrew Sullivan - 25 Aug 2006 15:46 GMT

On 24 Aug 2006 08:02:09 -0700, in rec.autos.makers.vw.watercooled
(message <1156431729.765759.69820@p79g2000cwp.googlegroups.com>),

> stop. I have also had at one point the fuel and water gauge both not
> working but that was short lived. I have replaced the temperature
> sender (the temp needle has always worked fine) I have replaced the
> connector on the end of the wire. I don't think that i have a sensor in
> the coolant resevoir. So I am stumped. What is causing the LED to flash

ISTR that there's also a sender of some kind on the oil cooler that is
inline with the oil filter. It's been a long time since I had my 84,
so I can't look at it. I recall something funky about that, though,
and it caused warnings.

It _may_ have been that the sensor was in fact for oil temperature, and
that's what caused the flashing light. What does your oil temp read?
Note that it's the temperature of the oil that, strictly speaking, does
the cooling of the engine, so the oil temperature is in fact important,
even though nobody normally worries about it.

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claysontelevision@yahoo.ca - 28 Aug 2006 14:25 GMT

Hello
Oil temp seems to be normal - the car runs great and is not
overheating.... just the flashing LED - it must be something
electrical - but the gauge works and there is only one wire from the
sender - maybe something inside the cluster? can't find and answer in
the bently and the haines manual suggests a faulty ignition switch.
Seems odd... would like confirmation before ripping that apart..

Thanks Matt

> On 24 Aug 2006 08:02:09 -0700, in rec.autos.makers.vw.watercooled
> (message <1156431729.765759.69820@p79g2000cwp.googlegroups.com>),
[quoted text clipped - 15 lines]
> the cooling of the engine, so the oil temperature is in fact important,
> even though nobody normally worries about it.

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Andrew Sullivan - 28 Aug 2006 18:45 GMT

On 28 Aug 2006 06:25:24 -0700, in rec.autos.makers.vw.watercooled
(message <1156771524.258646.82760@p79g2000cwp.googlegroups.com>),

> sender - maybe something inside the cluster? can't find and answer in
> the bently and the haines manual suggests a faulty ignition switch.

The Bentleys, as I recall, have wiring diagrams in them. I'd trace the
control of the LED back and figure it out that way.

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claysontelevision@yahoo.ca - 30 Aug 2006 17:05 GMT

I will try that... but it doesn't look easy. I have read as many
posts as I can on this issue and there does not seem to be a difinitive
answer to this problem. It seems to show up over many models and years
but there is no "one" answer to this issue. I am pretty sure that I
have eliminated all the obvious choices - it is now down to someone
giving me a specific to try that is out of the norm.

Matt

> On 28 Aug 2006 06:25:24 -0700, in rec.autos.makers.vw.watercooled
> (message <1156771524.258646.82760@p79g2000cwp.googlegroups.com>),
[quoted text clipped - 4 lines]
> The Bentleys, as I recall, have wiring diagrams in them. I'd trace the
> control of the LED back and figure it out that way.

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