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From: Tom Burton on 7 Aug 2008 05:07

>>
>
> Thanks All. I'll check the relay and fuse at the weekend.


Please post back with your finding i am having a similar problem with my
Combo van.



Tom


From: John on 7 Aug 2008 17:29

"The-Sbray" <the-sbray(a)nospamemail.com> wrote in message
news:JXmmk.38491$E41.8789(a)text.news.virginmedia.com...
> Hi
>
> I have a 2001 Corsa C which has a problwm with its intemittent wipe
> action. When you try to set it for intermittent, the wipers stop half-way
> across the windscreen. The auto park action also fails when in normal and
> fast wipe settings.
>
> I've replaced the motor and checked the linkage, which both seem fine.
>
> Anyone have an idea as to what could be causing the problem?
>

Bad earth through the switch? Most wipers are brought to a sudden stop by
the switch not only removing power (which it temporarily resumed by the park
mechanism until they get to the correct place) - the motor is then earthed
through the switch / steering column. This has the effect of braking the
motor when it starts to act like a generator with its own inertia,


From: John on 7 Aug 2008 19:05

"John" <Who90nospam(a)ntlworld.com> wrote in message
news:AOJmk.11237$x45.5125(a)newsfe17.ams2...
>
> "The-Sbray" <the-sbray(a)nospamemail.com> wrote in message
> news:JXmmk.38491$E41.8789(a)text.news.virginmedia.com...
>> Hi
>>
>> I have a 2001 Corsa C which has a problwm with its intemittent wipe
>> action. When you try to set it for intermittent, the wipers stop half-way
>> across the windscreen. The auto park action also fails when in normal and
>> fast wipe settings.
>>
>> I've replaced the motor and checked the linkage, which both seem fine.
>>
>> Anyone have an idea as to what could be causing the problem?
>>
>
> Bad earth through the switch? Most wipers are brought to a sudden stop by
> the switch not only removing power (which it temporarily resumed by the
> park mechanism until they get to the correct place) - the motor is then
> earthed through the switch / steering column. This has the effect of
> braking the motor when it starts to act like a generator with its own
> inertia,
>
In normal operation if you switch off the ignition the wipers will tend to
'coast' to a stop. The wiper switch actually shorts the motor to earth to
make it stop dead in the sector where the self park switch is aligned.
Obviously a poor earth will allow the motor to coast on and then re-energise
when the self park switch closes again


From: Conor on 8 Aug 2008 05:17
In article <BcLmk.89137$8w4.83879(a)newsfe30.ams2>, John says...

> In normal operation if you switch off the ignition the wipers will tend to
> 'coast' to a stop. The wiper switch actually shorts the motor to earth to
> make it stop dead in the sector where the self park switch is aligned.
> Obviously a poor earth will allow the motor to coast on and then re-energise
> when the self park switch closes again
>
Actually it doesn't. It cuts the supply from the constant ignition
switched 12V. You're talking complete bollox.

--
Conor

I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams
From: Chris Whelan on 8 Aug 2008 06:49
Conor wrote:

> In article <BcLmk.89137$8w4.83879(a)newsfe30.ams2>, John says...
>
>> In normal operation if you switch off the ignition the wipers will tend
>> to 'coast' to a stop. The wiper switch actually shorts the motor to earth
>> to make it stop dead in the sector where the self park switch is aligned.
>> Obviously a poor earth will allow the motor to coast on and then
>> re-energise when the self park switch closes again
>>
> Actually it doesn't. It cuts the supply from the constant ignition
> switched 12V. You're talking complete bollox.

On pretty much anything decent made in the last 20 years, when the wipers
are switched off the switched feed to the motor is removed, the constant
feed powers the motor until just before the park position, the
wipers "coast" the last few millimeters to the park position, and finally
the motor is earthed to bring it to an immediate stop. A poor earth
connection could indeed cause the wipers to fail to park.

Conor, your Capri might not be wired like this, but your Mondeo is, without
question.

Chris

--
Remove prejudice to reply.
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