How do they work? The ones on my 406 (1999) work fine in normal rain but in
drizzle they either seem far too keen and scrub away at a barely wet screen,
or far too apathetic and don't wipe until I have difficulty seeing. The
latter condition does seem to occur more if I've left them in auto mode for
a long time with no rain.

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Malc
"AFB Mr Tracey."
"Underbirths are og"
Les Barker - Irrational Neutscene
tricky4000 - 13 Nov 2006 23:57 GMT
Mine do the same. I'm not sure what the sensor actually is but it does
mistake fog on occasions as rain and will wipe wipe wipe at nothing
more than a visual. Bird crap will do it too.
Dan.
> How do they work? The ones on my 406 (1999) work fine in normal rain but in
> drizzle they either seem far too keen and scrub away at a barely wet screen,
[quoted text clipped - 9 lines]
>
> Les Barker - Irrational Neutscene
W.Lindsay - 14 Nov 2006 03:05 GMT
Not sure of detail but sensing mechanism is contained within "black-box" at
top centre of windscreen and contains a couple of LED`s which are visible
from outside of wind-screen.
Happy motoring,
Wally.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> Mine do the same. I'm not sure what the sensor actually is but it does
> mistake fog on occasions as rain and will wipe wipe wipe at nothing
[quoted text clipped - 17 lines]
>>
>> Les Barker - Irrational Neutscene
Keith Willcocks - 14 Nov 2006 08:40 GMT
> How do they work? The ones on my 406 (1999) work fine in normal rain but
> in drizzle they either seem far too keen and scrub away at a barely wet
> screen, or far too apathetic and don't wipe until I have difficulty
> seeing. The latter condition does seem to occur more if I've left them in
> auto mode for a long time with no rain.
http://static.howstuffworks.com/pdf/rain-sensor.pdf

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Keith Willcocks
(If you can't laugh at life, it ain't worth living!)