Clanger

While everyone seems to be of the opinion they are on all the time, the
Haynes manual does indicate that the Mirror Heating wiring is coming from
the Heated Rear Window switch circuit board. This makes me think they are on
the same timer control.

The plot thickens.....

clanger

"Petkan" <Plamen_Pettkov5_nospam_@hotmail.com> wrote in message
news:3fd01509$1_1@news.cybersurf.net...
> As an owner of a forth Audi, I can assure you that stock Audi heated
mirros
> work fine.
> They are activated whenever the rear defroster is. I have never replaced
> mirror glass on account of heater.
> Glass only (with embedded heater) or a whole mirror could be cheaply had
> from a scrap yard. Replacing the glass is easy. But both mirrors not to
work
> simultaneously ? The flexing harness to the front doors tend to crack.
Pull
> the rubber sleeve and examine the wires. Patch if required.
> Plamen, Toronto (1986 5000TQ, 1987 5000S, 1991 90 Q, 1993 100S)
> "Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
> news:bqlhtg$ht6$1@news7.svr.pol.co.uk...
> > the spec on my Audi A4 2.4V6 says it has Heated Wing mirrors.
> >
> > a Vauxhall CD I owned a number of years ago had superb heated mirrors as
> > they would defrost in a minute or so. The Audi ones are very poor or
maybe
> > not even functioning.
> >
> > I have checked the fuse and its OK
> >
> > What else should I use to check them out.
> >
> > regs
> > Don
> >
> >
>
>

Pete

"Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
news:bqpb3p$17m$1@news8.svr.pol.co.uk...
> While everyone seems to be of the opinion they are on all the time, the
> Haynes manual does indicate that the Mirror Heating wiring is coming from
> the Heated Rear Window switch circuit board. This makes me think they are
on
> the same timer control.
>
> The plot thickens.....

From the owner's manual of my '01 A4...

"At low outside temperatures the heated outside mirrors are activated
automatically when the ignition is switched on."

It does not say what 'low' means, though. Also, I'm not sure sure if it
changed betw. '98 and '01. It may have.

Cheers,

Pete

Romy Singh

"Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
news:bqpb3p$17m$1@news8.svr.pol.co.uk...
> While everyone seems to be of the opinion they are on all the time, the
> Haynes manual does indicate that the Mirror Heating wiring is coming from
> the Heated Rear Window switch circuit board. This makes me think they are
on
> the same timer control.
>
> The plot thickens.....
>
> clanger
>

That's not the case with my '98.5 A4, I haven't been using the rear
defroster much yet. But when I get out of the car after a drive and touch
the mirror, they are warm. It would be interesting to find out if power to
the heater is applied constantly (ignition on that is), but the actual
heating element has it's own temp sensor (somebody had mentioned a
thermistor). There is no indication of that in the bentley, and I'm pretty
sure it doesn't come off the defroster cct, definitely not after the switch.

One of us has to figure this out once and for all... )



Romy

Phil

Early 98's had ALWAYS on HEATED mirrors. SO the elements burned out.
REplacements contained a thermostat behind the glass (like a piece of
gum) to regulate on-off when temps dropped. If they do not get warm
(they actually should get HOT), you'll need to replace the mirror glass
only... VERY EASY TO DO ..

Phil

Clanger wrote:
> the spec on my Audi A4 2.4V6 says it has Heated Wing mirrors.
>
> a Vauxhall CD I owned a number of years ago had superb heated mirrors as
> they would defrost in a minute or so. The Audi ones are very poor or maybe
> not even functioning.
>
> I have checked the fuse and its OK
>
> What else should I use to check them out.
>
> regs
> Don
>
>

Clanger

today I costed new glass at £65 for both. Removed existing glass and both
elements buzzed through OK (no burned out or broken elements) both wires
going to each mirror checked out electrically OK. Though the drivers door
both wires open to ground. This I do not understand because if this were the
case when the ignition is switched on the fuse should blow. I know this cos
I did it on the passengers side. Mirrors should be on ALL time as you state,
but still no heaty.........I am puzzled, will next check out the ground
thingy.

clanger

"Phil" <ndccpf1@bellatlantic.net> wrote in message
news:3FD331BF.3030401@bellatlantic.net...
> Early 98's had ALWAYS on HEATED mirrors. SO the elements burned out.
> REplacements contained a thermostat behind the glass (like a piece of
> gum) to regulate on-off when temps dropped. If they do not get warm
> (they actually should get HOT), you'll need to replace the mirror glass
> only... VERY EASY TO DO ..
>
> Phil
>
> Clanger wrote:
> > the spec on my Audi A4 2.4V6 says it has Heated Wing mirrors.
> >
> > a Vauxhall CD I owned a number of years ago had superb heated mirrors as
> > they would defrost in a minute or so. The Audi ones are very poor or
maybe
> > not even functioning.
> >
> > I have checked the fuse and its OK
> >
> > What else should I use to check them out.
> >
> > regs
> > Don
> >
> >
>

Romy Singh

"Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
news:br2q6k$12t$1@newsg4.svr.pol.co.uk...
> today I costed new glass at £65 for both. Removed existing glass and both
> elements buzzed through OK (no burned out or broken elements) both wires
> going to each mirror checked out electrically OK. Though the drivers door
> both wires open to ground.
>
Did you mean both wires are "shorted" to ground? And how did you test for
that?


Romy

Clanger

sorry, both wires shorted to ground, tested with ohm meter (ignition
switched off) I have yet to do same to near side wiring.

Don


"Romy Singh" <cool5abi@hotmail.com> wrote in message
news:3GkBb.8412$sr2.2112@news01.bloor.is.net.cable .rogers.com...
>
> "Clanger" <D231@sidfseltd.freeserve.co.uk> wrote in message
> news:br2q6k$12t$1@newsg4.svr.pol.co.uk...
> > today I costed new glass at £65 for both. Removed existing glass and
both
> > elements buzzed through OK (no burned out or broken elements) both wires
> > going to each mirror checked out electrically OK. Though the drivers
door
> > both wires open to ground.
> >
> Did you mean both wires are "shorted" to ground? And how did you test for
> that?
>
>
> Romy
>
>