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Side mirror heating #1629475
11/02/2019 09:58
11/02/2019 09:58
Joined: Apr 2009
Posts: 157
Bucharest, Romania
mihai7645 Offline OP
On a journey
mihai7645  Offline OP
On a journey

Joined: Apr 2009
Posts: 157
Bucharest, Romania
A long time ago, while sitting at a stop light, a bus tried to climb onto my Coupe.
Fast forward by 7 years, a full respray and 5mm of freezing rain, my side mirror fell off.
After getting a replacement set of mirrors, I am not sure if the heating element works and I don't know how to measure it.
Does anyone know what values should the heating element have and when the car sends 12v to the mirror?
I measured 12v once in the wires with the ignition on, but could not replicate it again.
I really don't want to dismantle my other mirror to check for volts or ohms.
Car is a 16vt LHD.

Re: Side mirror heating [Re: mihai7645] #1629538
11/02/2019 22:39
11/02/2019 22:39
Joined: Jan 2006
Posts: 28
Mallorca
AndyW Offline
Discoverer
AndyW  Offline
Discoverer

Joined: Jan 2006
Posts: 28
Mallorca
On the 20v Turbo I think the heated mirrors only come on with the Max Defrost setting on aircon ( what a great feature by the way, why don't all cars have this?)

There is no direct switch for the heaters - may be different on 16v but hope this helps

Re: Side mirror heating [Re: mihai7645] #1629610
13/02/2019 00:22
13/02/2019 00:22
Joined: Jul 2012
Posts: 1,646
Dark side of the Moon
H_R Offline
Club member 1114
H_R  Offline
Club member 1114
My life on the forum

Joined: Jul 2012
Posts: 1,646
Dark side of the Moon
I was under the impression they come on with the heated rear screen??

Re: Side mirror heating [Re: H_R] #1629646
13/02/2019 17:45
13/02/2019 17:45
Joined: Mar 2008
Posts: 4,362
highlands
jimboy Offline
Club Member 857
jimboy  Offline
Club Member 857
Forum is my job

Joined: Mar 2008
Posts: 4,362
highlands
They do indeed come on with the heated screen.


I'm an old git & happy with it,most of the time
Re: Side mirror heating [Re: jimboy] #1629744
16/02/2019 11:38
16/02/2019 11:38
Joined: May 2009
Posts: 342
bristol
mr_nobut Offline
Club member 993
mr_nobut  Offline
Club member 993
Making a profit

Joined: May 2009
Posts: 342
bristol
The 20vts are supposed to have heated mirrors.
However noticed recently mine don’t seem to do anything anymore!!
Checked 12v feed and there is resistance in the wing mirror element and everything seems ok but alas condensation just sits there!!! Can they wear out? Do others notice a change to their mirrors when they turn on the demister on these damp mornings?
Puzzled!


inky goodness!!
Re: Side mirror heating [Re: mihai7645] #1629745
16/02/2019 13:23
16/02/2019 13:23
Joined: Dec 2005
Posts: 7,222
Lightwater, Surrey, UK
DaveG Offline
Club Member 311
DaveG  Offline
Club Member 311
Forum is my life

Joined: Dec 2005
Posts: 7,222
Lightwater, Surrey, UK
I've noticed the same thing on my Plus, if the mirror demisters did come on with the HRW, they didn't work. I also noticed that the HRW didn't turn itself off after 5 minutes or whatever period that it used to turn off on my Porto 20vt, maybe the heating/AC ECU was programmed differently on later cars?


1996 Portofino 20vt & 2000 Pearl White Plus
1985½ & 2016 2017 Fiat 124 Spider + XF Sportbrake
Re: Side mirror heating [Re: mihai7645] #1629768
16/02/2019 20:52
16/02/2019 20:52
Joined: Dec 2005
Posts: 1,262
Kent
Submariner Offline
My job on the forum
Submariner  Offline
My job on the forum

Joined: Dec 2005
Posts: 1,262
Kent
Think it is circa 20mins for the HRW and mirrors until auto off


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